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Glucose can be completely broken down into carbon dioxide an

题目
填空题
Glucose can be completely broken down into carbon dioxide and water when oxygen is present in the process called aerobic respiration.____
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相似问题和答案

第1题：

The ___________ of gases such as carbon dioxide should be stabilized at their present level.

A、emission

B、emit

C、radiation

D、evaporation


参考答案：A

第2题：

Theoretical perfect combustion in a diesel engine yields by-products of_____.

A.aldehydes and carbon dioxide

B.water vapor and carbon monoxide

C.nitrogen and carbon monoxide

D.water vapor and carbon dioxide


正确答案：D

第3题：

If the () of carbon dioxide in the atmosphere is increased as a result of air pollution.

A. rate

B. proportion

C. extent

D. amount


参考答案：B

第4题：

______, as the chemical extinguisher agent, should be used for an electric fire.

A.dry chemical or foam

B.foam or soda acid

C.carbon dioxide or foam

D.carbon dioxide or dry chemical


正确答案：D
二氧化碳或干粉灭火器作为化学灭火器，用于扑灭电器火灾。

第5题：

What could result in an incorrect oxygen concentration reading on the oxygen indicator ________．

A.Exposure to carbon dioxide for no more than 1 minute

B.Exposure to carbon dioxide for more than 10 minutes

C.Exposure to a very low concentration of sulfur dioxide for no more than 2 minutes

D.None of the above


正确答案：B

第6题：

The effect that exhaust gas recirculation can reduce NOX formation is partly due to a reduction of the()concentration in the combustion zone and partly due to the content of water and carbon dioxide in the exhaust gas.

A.Oxygen

B.Nitrogen

C.Sulphur

D.Freon


答案：C

第7题：

In the event of fire in a machinery space，______.

A.the fixed carbon dioxide system should be used only when all other means of extinguishment have failed

B.the fixed carbon dioxide system should be used immediately，as it is the most efficient means of extinguishment

C.water in any form should not be used as it will spread the fire

D.the space should be opened 5 minutes after flooding CO2 to prevent injury to personnel


正确答案：A

第8题：

What does the word “this” underlined in the third paragraph refer to?

A．We will lose much more than we can gain．

B．Humans have begun destroying rainforests．

C．People have a strong desire for resources．

D．Much carbon dioxide comes from burning rainforests．


正确答案：A

第9题：

The most effective way of applying carbon dioxide from a portable extinguisher to a fire is by ______．

A.Forming a cloud cover over the flames

B.Directing the gas at the base of the flames in a slow sweeping motion

C.Discharging the carbon dioxide into the heart of the flames

D.Bouncing the discharge off an adjacent bulkhead just above the burning surface


正确答案：B

第10题：

Passage 2
If the population of the earth goes on increasing at its present rate, there will eventually not be enough resources left to sustain life on the planet. By the middle of the 21st century, if present trends continue, we will have used up all the oil that drives our cars, for example. Even if scientists develop new ways of feeding the human race, the crowded conditions on earth will make it necessary for us to look for open space somewhere else. But none of the other planets in our solar system are capable of supporting life at present. One possible solution to the problem, however, has recently been suggested by an American scientist, Professor Carl Sagan.
Sagan believes that before the earth's resources are completely exhausted it will be possible to change the atmosphere of Venus and so create a new world almost as large as earth itself. The difficulty is that Venus is much hotter than the earth and there is only a tiny amount of water there.
Sagan proposes that algae organisms, which can live in extremely hot or cold atmospheres and at the same time produce oxygen, should be bred in conditions similar to those on Venus. As soon as this has been done, the algae will be placed in small rockets. Spaceships will then fly to Venus and fire the rockets into the atmosphere. In a fairly short time, the algae will break down the carbon dioxide into oxygen and carbon.
When the algae have done their work, the atmosphere will become cooler, but before man can set foot on Venus it will be necessary for the oxygen to produce rain. The surface of the planet will still be too hot for men to land on it but the rain will eventually fall and in a few years something like earth will be reproduced on Venus.
On Venus there is a lot of__________.

A. water
B. carbon dioxide
C. carbon monoxide
D. oxygen

答案：B
解析：
由第--f&的最后一句话中的“there is only a tiny amount ofwater there(Venus)”得知，A选项错误。第三段结尾说明，藻类通过火箭运往金星，然后“In a fairly short time，the algae will break down the carbon dioxide into oxygen and carbon”.说明金星上有大量的二氧化碳。C和D选项错误。故选B。

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