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问答题Chemistry is the study of the behavior and composition of matter. All foods aremade up of chemical substance which undergoes chemical changes when cooking　　 1．______in an oven or digested within the body. The cooking of meat and vegetables induce　2．__

题目
问答题
Chemistry is the study of the behavior and composition of matter. All foods aremade up of chemical substance which undergoes chemical changes when cooking　　    1．______in an oven or digested within the body. The cooking of meat and vegetables induce　2．______chemical changes, making it more delicious; similarly the leavening action of　　　3．______baking powder is a straightforward chemical change, as is the conversion ofstarch into sweet sugars by digestion.Cookery is a science requiring a knowledge of chemistry.　　　　　　　　　　　     4．______This is evident from the variety of cooking products and food additives availableas cooking oils, fats, colorings, sweeteners, tenderizers, flavorings, screamingagents, preservatives, etc. Each is carefully prepared before painstaking　　　　　5．______research.　　It is therefore essential for trained cookers to understand　　　　　　　　　　6．______chemical science in order to appreciate the chemistry nature of foods　　　　　　　7．______and the changes achieving on cooking. Homeworkers should also　　　　　　　　      8．______know cleansing agents and textiles used in the home and how the latter　　　　　　 9．______responds to the effects of heat, light, water, and chemical cleansing agents.　　　10．______
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相似问题和答案

第1题：

Which of the following documents should always be kept up－to－date after any major changes aremade to a network backbone?()

A. Network diagram

B. Performance baseline

C. Network security procedure

D. Company policy


参考答案：A

第2题：

Which statement is TRUE concerning the flash point of a substance ________．

A.It is lower than the ignition temperature

B.It is the temperature at which a substance will spontaneously ignite

C.It is the temperature at which a substance，when ignited，will continue to burn

D.It is the temperature at which the released vapors will fall within the explosive range


正确答案：A

第3题：

They use special chemical substance to _________ the growth of crops.

A aggravate

B accelerate

C strengthen

D reinforce


参考答案B

第4题：

共用题干
第二篇

Night of the Living Ants

When an ant dies,other ants move the dead insect out of the nest.This behavior is interesting to scien-
tists,who wonder how ants know for sure一and so soon一that another ant is dead.
Dong-Hwan Choe,a scientist at the University of California,found that Argentine ants have a chemical
on the outside of their bodies that signals to other ants,"I'm dead一take me away."
But there's a twist to Choe's discovery. These ants behave a little bit like zombies（僵尸）.Choe says
that the living ants一not just the dead ones一have this death chemicals. In other words,while an ant crawls
around,perhaps in a picnic or home,it's telling other ants that it's dead.
What keeps ants from hauling away the living dead? Choe found that Argentine ants have two additional
chemicals on their bodies,and these tell nearby ants something like,"Wait一I'm not dead yet."So Choe's
research turned up two sets of chemical signals in ants:one says,"I'm dead,"the other set says,"I'm not
dead yet."
Other scientists have tried to figure out how ants know when another ant is dead.If an ant is knocked
unconscious,other ants leave it alone until it wakes up.That means ants know that unmoving ants can still be
alive.
Choe suspects that when an Argentine ant dies,the chemical that says"Wait一I'm not dead yet"quickly
goes away. Once that chemical is gone,only the one that says"I'm dead"is left."It's because the dead ant
no longer smells like a living ant that it gets carried to the graveyard（墓地）,not because its body releases
new,unique chemicals after death,"said Choe.When other ants detect the"dead"chemical without the"not
dead yet" chemical,they haul away the body. This was Choe's hypothesis（假设）.
To test his hypothesis,Choe and his team put different chemicals on Argentine ant pupae（蛹）.When
the scientists used the"I'm dead"chemical,other ants quickly hauled the treated pupae away.When the sci-
entists used the"Wait一I'm not dead yet"chemical,other ants left the treated pupae alone.Choe believes
this behavior shows that the" not dead yet" chemical overrides（优先于）the" dead" chemical when picked up
by adult ants.And that when an ant dies,the"not dead yet"chemical fades away.Other nearby ants then de-
tect the remaining"dead"chemical and remove the body from the nest.

Which of the following statements is NOT true of ants?
A:Ants know very soon that?another ant is dead.
B:When an ant is dead,others move its body out of the nest.
C:If an ant is unconscious,it is moved out of the nest.
D:Living ants have the"I'm dead"chemical on their bodies.

答案：C
解析：
第二段提到：加州大学的科学家周东环发现阿根廷蚂蚁的身体能向外释放一种化学物 质来告诉同伴：“我死了，把我挪走吧。”
根据第五段第二句可推断出C项错误。
倒数第二段提到：一只阿根廷蚂蚁死后，发出“等等，我还没死呢”这一信号的化学物质 立刻消失，因此选D。
周的假设是表明“我死了”的化学物质是蚂蚁本身就有的，而非死后释放的。它和表明 “我没死”的化学物质同时存在于活着的蚂蚁身上，只不过其优先权不如表明“我没死”的化学 物质。实验结果是：当科学家用“我已死”化学物质时，蚂蚁们立刻将处理过的蛹拉走。当科 学家使用“等等，我还没死”化学物质时，其他蚂蚁并不碰这个蛹。所以，周的假设是正确的。
本文主要讲述了蚂蚁们如何迅速准确地得知同伴死了，所以选D。 第三篇 本文介绍了在山口发现的一具躺在冰上的尸体，以及由此引发的研究和种种猜测。

第5题：

共用题干
第二篇

Night of the Living Ants

When an ant dies,other ants move the dead insect out of the nest.This behavior is interesting to scien-
tists,who wonder how ants know for sure一and so soon一that another ant is dead.
Dong-Hwan Choe,a scientist at the University of California,found that Argentine ants have a chemical
on the outside of their bodies that signals to other ants,"I'm dead一take me away."
But there's a twist to Choe's discovery. These ants behave a little bit like zombies（僵尸）.Choe says
that the living ants一not just the dead ones一have this death chemicals. In other words,while an ant crawls
around,perhaps in a picnic or home,it's telling other ants that it's dead.
What keeps ants from hauling away the living dead? Choe found that Argentine ants have two additional
chemicals on their bodies,and these tell nearby ants something like,"Wait一I'm not dead yet."So Choe's
research turned up two sets of chemical signals in ants:one says,"I'm dead,"the other set says,"I'm not
dead yet."
Other scientists have tried to figure out how ants know when another ant is dead.If an ant is knocked
unconscious,other ants leave it alone until it wakes up.That means ants know that unmoving ants can still be
alive.
Choe suspects that when an Argentine ant dies,the chemical that says"Wait一I'm not dead yet"quickly
goes away. Once that chemical is gone,only the one that says"I'm dead"is left."It's because the dead ant
no longer smells like a living ant that it gets carried to the graveyard（墓地）,not because its body releases
new,unique chemicals after death,"said Choe.When other ants detect the"dead"chemical without the"not
dead yet" chemical,they haul away the body. This was Choe's hypothesis（假设）.
To test his hypothesis,Choe and his team put different chemicals on Argentine ant pupae（蛹）.When
the scientists used the"I'm dead"chemical,other ants quickly hauled the treated pupae away.When the sci-
entists used the"Wait一I'm not dead yet"chemical,other ants left the treated pupae alone.Choe believes
this behavior shows that the" not dead yet" chemical overrides（优先于）the" dead" chemical when picked up
by adult ants.And that when an ant dies,the"not dead yet"chemical fades away.Other nearby ants then de-
tect the remaining"dead"chemical and remove the body from the nest.

According to Choe's hypothesis,_______________.
A:an ant still smells like a living one when it dies
B:the"I am dead"chemical leaves the ant's body when it dies
C:the"I am not dead yet"chemical is left when an ant dies
D:the"I am not dead yet"chemical quickly goes away when it dies

答案：D
解析：
第二段提到：加州大学的科学家周东环发现阿根廷蚂蚁的身体能向外释放一种化学物 质来告诉同伴：“我死了，把我挪走吧。”
根据第五段第二句可推断出C项错误。
倒数第二段提到：一只阿根廷蚂蚁死后，发出“等等，我还没死呢”这一信号的化学物质 立刻消失，因此选D。
周的假设是表明“我死了”的化学物质是蚂蚁本身就有的，而非死后释放的。它和表明 “我没死”的化学物质同时存在于活着的蚂蚁身上，只不过其优先权不如表明“我没死”的化学 物质。实验结果是：当科学家用“我已死”化学物质时，蚂蚁们立刻将处理过的蛹拉走。当科 学家使用“等等，我还没死”化学物质时，其他蚂蚁并不碰这个蛹。所以，周的假设是正确的。
本文主要讲述了蚂蚁们如何迅速准确地得知同伴死了，所以选D。 第三篇 本文介绍了在山口发现的一具躺在冰上的尸体，以及由此引发的研究和种种猜测。

第6题：

Spontaneous combustion is caused by ______．

A.An outside heat source heating a substance until it ignites

B.Conduction of heat through a wall of material to the substance

C.Chemical action within a substance

D.All of the above


正确答案：C

第7题：

Which of the following may be used in cleaning up an oil spill without the permission of governmental authorities ________．

A.Straw and Skimmers only

B.Skimmers and Chemical dispersants only

C.Straw and Chemical dispersants only

D.Straw，Skimmers and Chemical dispersants


正确答案：A

第8题：

We get energy from the foods we eat.Our food supplies energy to keep our organs working.Our food also supplies heat to warm our bodies.

The main energy foods are the carbohydrates (碳水化合物).These are the sugars and starches(淀粉). Wheat and rice are rich in starch and many fruits and vegetables contain considerable amount of sugar. Sweets, honey and jam are also rich in sugar.

Like carbohydrates, fats are food that provides us with energy. Butter, margarine, certain types of fish, eggs, cooking oils and most red meats are rich in fats. Fats can be stored in various parts of the body as reserves of energy. Because fats in general are slowly digested, they satisfy hunger for long periods.

Proteins (蛋白质) are very complex substances. The body needs proteins for the growth of new cells and for the repair and replacement of old cells. Foods rich in proteins are essential to a balanced diet. Milk, some vegetables, meat, chicken, fish, cheese, grains and nuts are some foods rich in proteins.

A good diet will contain a variety of foods so that the body contains all the minerals it needs for good health.

Vitamins are necessary for the proper working of the body. If we eat a variety of foods, we can be sure of obtaining all the vitamins we need.

Water makes up about 70 per cent of the weight of the human body. The average adult needs about two liters of water daily to replace the water the body loses.

1.Of the following substances, which are not used as sources of energy by living things?()

A. Starches

B. Vitamins

C. Proteins

D. Fats

2.If equal weight of the following substances is “burned” in the body,

A. carbohydrates

B. fats

C. vitamins

D. mineral salts

3.A boy grows five centimeters a year.The new material

A. fats

B. vitamins

C. proteins

D.carbohydrates

4.Which of the following is not true?()

A. If a man weighs 150 pounds, 105 pounds are water.

B. Apple, butter and meat are rich in proteins.

C. A well-balanced diet contains proteins, fats, minerals and vitamins.

D. Biscuits, cake and sweets may provide us with energy.

5.People can get all the minerals the body needs by().

A. having a balanced diet

B. drinking more milk

C. eating fruits and vegetables

D. having more fish and eggs


参考答案BBCBA

第9题：

共用题干
第二篇

Night of the Living Ants

When an ant dies,other ants move the dead insect out of the nest.This behavior is interesting to scien-
tists,who wonder how ants know for sure一and so soon一that another ant is dead.
Dong-Hwan Choe,a scientist at the University of California,found that Argentine ants have a chemical
on the outside of their bodies that signals to other ants,"I'm dead一take me away."
But there's a twist to Choe's discovery. These ants behave a little bit like zombies（僵尸）.Choe says
that the living ants一not just the dead ones一have this death chemicals. In other words,while an ant crawls
around,perhaps in a picnic or home,it's telling other ants that it's dead.
What keeps ants from hauling away the living dead? Choe found that Argentine ants have two additional
chemicals on their bodies,and these tell nearby ants something like,"Wait一I'm not dead yet."So Choe's
research turned up two sets of chemical signals in ants:one says,"I'm dead,"the other set says,"I'm not
dead yet."
Other scientists have tried to figure out how ants know when another ant is dead.If an ant is knocked
unconscious,other ants leave it alone until it wakes up.That means ants know that unmoving ants can still be
alive.
Choe suspects that when an Argentine ant dies,the chemical that says"Wait一I'm not dead yet"quickly
goes away. Once that chemical is gone,only the one that says"I'm dead"is left."It's because the dead ant
no longer smells like a living ant that it gets carried to the graveyard（墓地）,not because its body releases
new,unique chemicals after death,"said Choe.When other ants detect the"dead"chemical without the"not
dead yet" chemical,they haul away the body. This was Choe's hypothesis（假设）.
To test his hypothesis,Choe and his team put different chemicals on Argentine ant pupae（蛹）.When
the scientists used the"I'm dead"chemical,other ants quickly hauled the treated pupae away.When the sci-
entists used the"Wait一I'm not dead yet"chemical,other ants left the treated pupae alone.Choe believes
this behavior shows that the" not dead yet" chemical overrides（优先于）the" dead" chemical when picked up
by adult ants.And that when an ant dies,the"not dead yet"chemical fades away.Other nearby ants then de-
tect the remaining"dead"chemical and remove the body from the nest.

The passage"Night of the Living Ants"tells us about_______________.
A:how an ant is moved out of the nest at night
B:what an ant does at night
C:how an ant finds its way in darkness
D:what happens when an ant dies

答案：D
解析：
第二段提到：加州大学的科学家周东环发现阿根廷蚂蚁的身体能向外释放一种化学物 质来告诉同伴：“我死了，把我挪走吧。”
根据第五段第二句可推断出C项错误。
倒数第二段提到：一只阿根廷蚂蚁死后，发出“等等，我还没死呢”这一信号的化学物质 立刻消失，因此选D。
周的假设是表明“我死了”的化学物质是蚂蚁本身就有的，而非死后释放的。它和表明 “我没死”的化学物质同时存在于活着的蚂蚁身上，只不过其优先权不如表明“我没死”的化学 物质。实验结果是：当科学家用“我已死”化学物质时，蚂蚁们立刻将处理过的蛹拉走。当科 学家使用“等等，我还没死”化学物质时，其他蚂蚁并不碰这个蛹。所以，周的假设是正确的。
本文主要讲述了蚂蚁们如何迅速准确地得知同伴死了，所以选D。 第三篇 本文介绍了在山口发现的一具躺在冰上的尸体，以及由此引发的研究和种种猜测。

第10题：

共用题干
第二篇

Night of the Living Ants

When an ant dies,other ants move the dead insect out of the nest.This behavior is interesting to scien-
tists,who wonder how ants know for sure一and so soon一that another ant is dead.
Dong-Hwan Choe,a scientist at the University of California,found that Argentine ants have a chemical
on the outside of their bodies that signals to other ants,"I'm dead一take me away."
But there's a twist to Choe's discovery. These ants behave a little bit like zombies（僵尸）.Choe says
that the living ants一not just the dead ones一have this death chemicals. In other words,while an ant crawls
around,perhaps in a picnic or home,it's telling other ants that it's dead.
What keeps ants from hauling away the living dead? Choe found that Argentine ants have two additional
chemicals on their bodies,and these tell nearby ants something like,"Wait一I'm not dead yet."So Choe's
research turned up two sets of chemical signals in ants:one says,"I'm dead,"the other set says,"I'm not
dead yet."
Other scientists have tried to figure out how ants know when another ant is dead.If an ant is knocked
unconscious,other ants leave it alone until it wakes up.That means ants know that unmoving ants can still be
alive.
Choe suspects that when an Argentine ant dies,the chemical that says"Wait一I'm not dead yet"quickly
goes away. Once that chemical is gone,only the one that says"I'm dead"is left."It's because the dead ant
no longer smells like a living ant that it gets carried to the graveyard（墓地）,not because its body releases
new,unique chemicals after death,"said Choe.When other ants detect the"dead"chemical without the"not
dead yet" chemical,they haul away the body. This was Choe's hypothesis（假设）.
To test his hypothesis,Choe and his team put different chemicals on Argentine ant pupae（蛹）.When
the scientists used the"I'm dead"chemical,other ants quickly hauled the treated pupae away.When the sci-
entists used the"Wait一I'm not dead yet"chemical,other ants left the treated pupae alone.Choe believes
this behavior shows that the" not dead yet" chemical overrides（优先于）the" dead" chemical when picked up
by adult ants.And that when an ant dies,the"not dead yet"chemical fades away.Other nearby ants then de-
tect the remaining"dead"chemical and remove the body from the nest.

According to Paragraph 7,what is the result. of the test on Choe's hypothesis?
A:It shows that his hypothesis is wrong.
B:It proves that his hypothesis is convincing.
C:It suggests that his hypothesis needs revising.
D:Not enough evidence has been found to support his hypothesis.

答案：B
解析：
第二段提到：加州大学的科学家周东环发现阿根廷蚂蚁的身体能向外释放一种化学物 质来告诉同伴：“我死了，把我挪走吧。”
根据第五段第二句可推断出C项错误。
倒数第二段提到：一只阿根廷蚂蚁死后，发出“等等，我还没死呢”这一信号的化学物质 立刻消失，因此选D。
周的假设是表明“我死了”的化学物质是蚂蚁本身就有的，而非死后释放的。它和表明 “我没死”的化学物质同时存在于活着的蚂蚁身上，只不过其优先权不如表明“我没死”的化学 物质。实验结果是：当科学家用“我已死”化学物质时，蚂蚁们立刻将处理过的蛹拉走。当科 学家使用“等等，我还没死”化学物质时，其他蚂蚁并不碰这个蛹。所以，周的假设是正确的。
本文主要讲述了蚂蚁们如何迅速准确地得知同伴死了，所以选D。 第三篇 本文介绍了在山口发现的一具躺在冰上的尸体，以及由此引发的研究和种种猜测。

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