违法和不良信息举报 联系客服
免费注册 登录

Sperm whales can produce stronger ultrasonic waves to kill their prey than dolphins.A．RightB．WrongC．Not mentioned

题目

Sperm whales can produce stronger ultrasonic waves to kill their prey than dolphins.

A．Right

B．Wrong

C．Not mentioned

如果没有搜索结果或未解决您的问题，请直接 联系老师 获取答案。
相似问题和答案

第1题：

13 A life cycle project manager tends to have the following characteristics:

A. balanced training

B. stronger administrative skills than technical skills

C. stronger technical skills than administrative skills

D. stronger human resource skills

E. None of the above


正确答案：B

第2题：

Ronan Hickey analyzed almost 2000 different dialects of the bottle-nose dolphins.

A．Right

B．Wrong

C．Not mentioned


正确答案：B
解析：问题中的关键词组是of the bottle-nose dolphins。利用问题句中的特征词Ronan Hickey(人名)和2000 different(不同的)dialects为答案线索，对应原文第三段第一句，…student Ronan Hiekey digitised and analyzed a total of 1,882 whistles from the Irish dolphins and those from the welsh dolphins…可知Ronan Hickey不是分析宽吻海豚，而是爱尔兰海豚和威尔士海豚发出的近2000种不同的啸声(不是方言)。所以，本题选项B是答案。

第3题：

A life cycle project manager tends to have the following characteristics:

A . balanced training

B . stronger administrative skills than technical skills

C . stronger technical skills than administrative skills

D . stronger human resource skills

E . None of the above.


正确答案：B

第4题：

共用题干
New Understanding of Natural Silk's Mysteries

Natural silk,as we all know,has a strength that man-made materials have long struggled to match.In a
discovery that sounds more like an ancient Chinese proverb than a materials science breakthrough,MIT re-
searchers have discovered that silk gets its strength from its weakness.Or,more specifically,its many weak-
nesses. Silk gets its extraordinary durability and ductility（柔韧性）from an unusual arrangement of hydrogen
bonds that are intrinsically very weak but that work together to create a strong,flexible structure.
Most materials一especially the ones we engineer for strength一get their toughness from brittleness.As
such,natural silks like those produced by spiders have long fascinated both biologists and engineers because of
their light weight,ductility and high strength(pound for pound,silk is stronger than steel and far less brittle).
But on its face,it doesn't seem that silks should be as strong as they are;molecularly,they are held together by
hydrogen bonds , which are far weaker than the covalent（共价的）bonds found in other molecules.
To get a better understanding of how silk manages to produce such strength through such weak bonds,
the MIT team created a set of computer models that allowed them to observe the way silk behaves at the
atomic level. They found that the arrangement of the tiny silk nanocrystals（纳米晶体）is such that the hydro-
gen bonds are able to work cooperatively,reinforcing one another against external forces and failing slowly
when they do fail,so as not to allow a sudden fracture to spread across a silk structure.
The result is natural silks that can stretch and bend while retaining a high degree of strength.But while
that's all well and good for spiders,bees and the like,this understanding of silk geometry could lead to new
materials that are stronger and more ductile than those we can currently manufacture.Our best and strongest
materials are generally expensive and difficult to produce(requiring high temperature treatments or
energy-intensive processes).
By looking to silk as a model,researchers could potentially devise new manufacturing methods that rely
on inexpensive materials and weak bonds to create less rigid,more forgiving materials that are nonetheless
stronger than anything currently on offer. And if you thought you were going to get out of this materials
science story without hearing about carbon nanotubes（纳米碳管）, think again. The MIT team is already in
the lab looking into ways of synthesizing silk-like structures out of materials that are stronger than natural
silk-like carbon nanotubes. Super-silks are on the horizon.

It is indicated that materials stronger than natural silk can be expected in the future.
A:Right
B:Wrong
C:Not mentioned

答案：A
解析：
题干的相关内容在第一段第二句，但文中说的是“In a discovery that sounds more like an ancient Chinese proverb than a materials science breakthrough,MIT researchers have discovered that silk gets its strength from its weakness.（一项研究的成果听起来更像一则古代中国谚语而不是材 料科学的突破，在这项研究中，麻省理工学院的研究人员发现，蚕丝的强度源于其脆弱。）”题 干说的是：麻省理工学院的研究员开展这项研究以说明一则古代中国谚语。这与文章所述不 一致。
题干的相关内容在第一段最后一句“Silk gets its extraordinary durability and ductility from an unusual arrangement of hydrogen bonds that are inherently very weak but that work together to create a strong , flexible structure.（蚕丝的异常耐久性和延展性来自一种特别的氢键结构，这些 氢键本质上非常脆弱，但它们共同创造了一种强劲而富有弹性的结构。）”题干说的是：蚕丝的 强韧来自其脆弱的氢键的协同合作。这与文章所述一致。
题干的相关内容在第二段第二句“...natural silks like those produced by spiders have long fascinated both biologists and engineers because of their light weight,ductility and high strength… （……和蜘蛛制造的蛛丝类似的天然蚕丝，因其重量轻，延展性强和韧性高，长期以来令生物学 家和工程师很感兴趣……）”题干说的是：生物学家和工程师对理解天然蚕丝很感兴趣，因为 它们很轻、很脆。这与文章所述不一致。brittle的意思是“脆的，硬但易碎的”。
题干的相关内容在第三段最后一句“...the hydrogen bonds are able to work cooperatively, reinforcing one another against external forces and failing slowly when they do fail,so as not to allowa sudden fracture to spread across a silk structure.（氢键能够齐心协力地合作，相互增援，对抗外 力，同时，它们确实维持不下去时也是慢慢衰退，这样蚕丝的整体结构就不至于出现突然的断 裂。）”题干所说的是：如果氢键因外力而断裂，它们断得很快。这与文章所述不一致。
题干所说的是：麻省理工学院研究组在研究天然蚕丝之前研究过不同的材料。这在文 中没有提及。
题干所说的是：纳米碳管是目前材料学中最盛行的话题。这在文中没有提及。
根据最后一段最后两句可知，研究人员正在想办法用比自然丝状纳米碳管更强韧的材 料合成丝状结构，超级丝就要出现了。题干所说的是：研究表明，比天然蚕丝更强韧的材料有 望在将来出现。这与文章所述一致。第3部分：概括大意与完成句子

第5题：

Whistles could also be used to communicate between adult dolphins and baby dolphins.

A．Right

B．Wrong

C．Not mentioned


正确答案：A
解析：问题中的关键词是adult dolphins和baby dolphins。对应原文第四段第一句，“We are building up a catalogue of the different whistle types they use and trying to associate them with behavior. like foraging，resting，socialising and the communications of groups with calves．”说科学家正在设法将啸声与海豚的行为特性联系起来，包括海豚觅食、休息、社交和有幼崽的群体间的交流等，由此可知这也包括成年海豚与小海豚之间的联络这种行为。题句的意思与原句的意思相符，所以答案是A。

第6题：

Irish Dolphins May Have a Unique Dialect

Irish scientists monitoring dolphins living in a river estuary in the southwest of the country believe they may have developed a unique dialect to communicate with each other.

The Channel Dolphin and Wildlife Foundation (SDWF) has been studying a group of up to 120 bottle-nose dolphins in the River Shannon using vocalisations collected on a computer in a cow shed near the River Shannon.

As part of a research project, student Ronan Hickey digitised and analysed a total of 1,882 whistles from the Irish dolphins and those from the Welsh dolphins on a computer and separated them into six fundamental whistle types and 32 different categories. Of the categories, he found most were used by both sets of dolphins—but eight were only heard from the Irish dolphins.

"We are building up a catalogue of the different whistle types they use and trying to associate them with behaviour like foraging, resting, socialising and the communications of groups with calves," project leader Simon Berrow said. "Essentially we are building up what is like a dictionary of words they use or sounds they make. "

Berrow, a marine biologist, said the dolphins' clicks are used to find their way around and locate prey. The whistles are communications. "They do a whole range of other sounds like barks, groans and a kind of gunshot. " He said. "The gunshot is an intense pulse of sound. Sperm whales use it to stun their prey. "

"When I first heard it I was surprised as I thought sperm whales were the only species who used it. We can speculate the dolphins are using it for the same reason as the sperm whales. " Berrow said.

References in local legend indicate there have been dolphins in the Shannon estuary for generations and they may even have been resident there as far back as the 6th century.

They are regularly seen by passengers on the Shannon ferry and an estimated 25,000 tourists every year take special sightseeing tours on local boats to visit them.

The difference in eating habits between the bottle-nose dolphins and the sperm whales interested the SDWF scientists.

A．Right

B．Wrong

C．Not mentioned


正确答案：C
解析：问题中的关键词是eating，利用问题句中的信息词bottle-nose dolphins，sperm whales，eating habits和特征词SDWF(香农海豚与野生动物基金会)scientists共同作为答案线索，对应内容在原文第二段、第三段，原文中只提到科学家们研究了啸声，而未出现eating，或相关词food食物，feed喂食等内容，因此判断为未提及。

第7题：

Of the 32 categories, eight were produced only by the Irish dolphins.

A．Right

B．Wrong

C．Not mentioned


正确答案：A
解析：问题中的关键词是eight。利用问题句中的特征词32 categories，eight，Irish(爱尔兰的)dolphins共同作为答案线索，对应原文第三第二句，Of the categories，he found most were used by both sets of dolphins—but eight were only heard from the Irish dolphins．从句中可以知道答案相关句与问题句的句意一致：32种啸声中有8种是爱尔兰海豚独有的，所以答案是A。

第8题：

Which of the following is NOT mentioned(提到)in this passage?

A. The problems that light pollution has caused.

B. The reason why humans use too much light.

C. The ways that light pollution can be reduced.

D. The reason why fewer stars can be seen than before.


正确答案：B

第9题：

The correction to be applied to a LoranC reading when matching a sky wave to a ground wave may be found______．

A.on loran charts covering areas where sky waves are used

B.in the Radio Aids to Navigation PUB 117

C.in the LoranC Correction Tables

D.Sky waves cannot be matched to ground waves in LoranC to produce a usable reading


正确答案：A
这个修正用于罗兰C查阅当天波到地波相匹配时天波在罗兰海图覆盖的海域被发现。

第10题：

He is（ ）a horse．

A.stronger as
B.as stronger than
C.the strong as
D.stronger than

答案：D
解析：
比较级形容词前不加定冠词。

更多相关问题
相关内容