here is no ________ thinking more about the matter. Take it easy.
[     ]
A. point  
B. fun  
C. doubt  
D. need
練習(xí)冊(cè)系列答案
相關(guān)習(xí)題

科目：高中英語(yǔ) 來(lái)源：英語(yǔ)教研室 題型：050

　　Is there life on Mars（火星）? We do not know. But we are sure that earth people do not live on Mars. Earth people need oxygen to breathe. There is almost no oxygen on Mars. It is uncertain exactly how life arose on Earth, so it is difficult to determine how common such mechanisms are. But if life also arose on Mars, this would show that those mechanisms operated not just once, but twice, arguing that life may well be common elsewhere.

　　Living on Mars would be like living on a very high mountain. There would be little air. It might be 50 degree above zero at noon and 100 degree below zero at night.

　　Many people think there may be plants on Mars. We know that Mars has carbon. This is a kind of material found in all plants and animals on earth. Through a telescope, Mars looks red. In some places, it seems gray. At times, the gray colour turns gray--green, then brown, then gray again. The gray-green colour may be a kind of plant life changing colour with seasons.

　　Mars is a spectacular（引人入勝）place, and will remain so even if it is finally proved to be lifeless. Today, we don't know for sure if there is or ever was life on Mars. But one thing is certain--one day, there will be.

　　Will man go to Mars one day? If they do, they will have to take along their own oxygen, food, clothing, and shelter（住所）.

(1)What do you think is the main reason why men can't live on Mars? Because ________ .

[　　]

A．living on Mars is like living on a high mountain

B．here is no oxygen on Mars

C．there are not any plants or animals on Mars

D．on Mars it is too hot at noon and too cold at night

(2)The story does not say this, but from what we have read, we can tell that ________ .

[　　]

A．someday we may know if there is life on Mars

B．men must take food and clothing with them when they go to Mars

C．people on Mars need no air to breathe

D．the plants on Mars are red

(3)The main idea of the whole story is that ________ .

[　　]

A．there may be life on Mars

B．earth people could live on Mars

C．Mars turns its colour with seasons

D．man will one day land on Mars

(4)Which of the following does this story lead you to believe? ________ .

[　　]

A．Some earth people have already visited Mars

B．There is a lot of oxygen and carbon on Mars

C．There may be strange forms of life on Mars

D．Mars is earth people's future home

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：053

　　Is there life on Mars（火星）? We do not know. But we are sure that earth people do not live on Mars. Earth people need oxygen to breathe. There is almost no oxygen on Mars. It is uncertain exactly how life arose on Earth, so it is difficult to determine how common such mechanisms are. But if life also arose on Mars, this would show that those mechanisms operated not just once, but twice, arguing that life may well be common elsewhere.

　　Living on Mars would be like living on a very high mountain. There would be little air. It might be 50 degree above zero at noon and 100 degree below zero at night.

　　Many people think there may be plants on Mars. We know that Mars has carbon. This is a kind of material found in all plants and animals on earth. Through a telescope, Mars looks red. In some places, it seems gray. At times, the gray colour turns gray--green, then brown, then gray again. The gray-green colour may be a kind of plant life changing colour with seasons.

　　Mars is a spectacular（引人入勝）place, and will remain so even if it is finally proved to be lifeless. Today, we don't know for sure if there is or ever was life on Mars. But one thing is certain--one day, there will be.

　　Will man go to Mars one day? If they do, they will have to take along their own oxygen, food, clothing, and shelter（住所）.

(1)What do you think is the main reason why men can't live on Mars? Because ________ .

[　　]

A．living on Mars is like living on a high mountain

B．here is no oxygen on Mars

C．there are not any plants or animals on Mars

D．on Mars it is too hot at noon and too cold at night

(2)The story does not say this, but from what we have read, we can tell that ________ .

[　　]

A．someday we may know if there is life on Mars

B．men must take food and clothing with them when they go to Mars

C．people on Mars need no air to breathe

D．the plants on Mars are red

(3)The main idea of the whole story is that ________ .

[　　]

A．there may be life on Mars

B．earth people could live on Mars

C．Mars turns its colour with seasons

D．man will one day land on Mars

(4)Which of the following does this story lead you to believe? ________ .

[　　]

A．Some earth people have already visited Mars

B．There is a lot of oxygen and carbon on Mars

C．There may be strange forms of life on Mars

D．Mars is earth people's future home

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源：2013-2014學(xué)年福建省漳州市七校高三第二次聯(lián)考英語(yǔ)試卷（解析版） 題型：閱讀理解

The Royal Commission on Environmental Pollution has just published a report on new materials and has looked at the case of nanotechnology（納米技術(shù)）, which describes the science of the very small. Nanotechnology covers those man-made materials or objects that are about a thousand times smaller than the microtechnology（微電子技術(shù)）we use, such as the silicon chips of computers.

Nanotechnology gets its name from the nanometer, which is a billionth of a meter. There are about 600 consumer products already on the market that use nanotechnology. Nanomedicine is also being developed to fight cancer and other fatal diseases.

The Royal Commission found no evidence of harm to health or the environment from nanomaterials, but this “absence of evidence” is not being taken as “evidence of absence”. In other words, just because there are no apparent problems, this is not to say that here is no risk now or in the future. The commission is concerned about the pace at which we are inventing and adopting new nanomaterials, which could result in future problems that we are ill-equipped to understand or even find with current testing methods.

One of the problems about nanotechnology is that when we make something very small out of a well known material, we may actually change the functionality of that material even if the chemical composition remains the same. Indeed, it is not the particle（顆粒）size that should concern us, but its functionality. Take gold, for example, which is a famously inert (惰性) substance, and valuable because of it. It doesn’t rust or corrode because it doesn’t interact with water or oxygen. However, a particle of gold that is between 2 and 5 nanometers in diameter becomes highly reactive. This is not due to a change in chemical composition, but because of a change in the physical size of the gold particles. How can a change in size result in a change of function? One reason is to do with surface area. Nanoparticles have relatively a much bigger surface area. It is like comparing the surface area of a basketball with the total surface area of many pea-sized balls with the same weight of the single basketball. The pea-sized balls have a surface area many hundreds, indeed thousands of times bigger than the basketball, and this allows them to interact more easily with the environment. It is this increased interactivity that changes their functionality—and makes them potentially more dangerous to health or the environment.

1.Why does the writer mention microtechnology in the first paragraph?

A. to introduce the topic of nanotechnology

B. to help us better understand nanotechnology

C. to help us know more about microtechnology

D. to compare microtechnology with nanotechnology

2.The example of the “gold” in the last paragraph is intended to show that_________.

A. gold is valuable because it is an inert substance

B. an inert substance like gold doesn’t interact with water or oxygen

C. the function of gold is steady because it is an inert substance

D. the function of gold changes when made into something very small

3.Which process explains that there might be risks in nanotechnology?

A. expand surface area →increase interactivity → change functionality→cause possible dangers

B. expand surface area → change functionality → increase interactivity →cause possible dangers

C. increase interactivity → expand surface area → change functionality→cause possible dangers

D. increase interactivity → change functionality → expand surface area→cause possible dangers

4.What does the passage mainly focus on?

A. the introduction of nanotechnology and its wide use

B. the present use of nanotechnology and its future

C. the potential danger nanotechnology may bring us

D. the proposal to stop nanotechnology due to the potential danger

 

查看答案和解析>>

科目：高中英語(yǔ) 來(lái)源： 題型：

here is no a_______ to the house from the main road.

 

查看答案和解析>>

同步練習(xí)冊(cè)答案