题目内容

Clean water ______the village people in the flooded area.

A. is not easily accessible to B. has no easy access to

C. is not easily accessible for D. has no easy access for

 

A

【解析】

试题分析:句意:干净的水是洪水地区的人们很难得到的.词组:sth be accessible to sb.某事为某人所获得,have access to是某人有机会获得某物,所以选A。

考点:考查词组

 

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It often seems that people have a hard time in speaking a seemingly familiar name. Did you ever have someone's name on the tip of your tongue and yet you were not able to recall it? When this happened,what did you do? Next time this happens again,what should you do?

You should not try to recall it. Instead, just do something else for a couple of minutes and then the name may come into your head. Why? The name is just there, since you have met this person and learned his name. It, waiting there, only has to be dug out. The initial(最初的) effort to recall prepares the mind for operation, but it is the subconscious (下意识的) activities that go to work to dig up a dim(模糊的)memory. Forcing yourself to recall almost never helps because it doesn't loosen your memory; it only tightens it.

That’s why students find the preparatory method greatly helpful in examinations. They read over the questions before trying to answer any of them. Then they answer first the ones of which they are most confident. At the same time, deeper mental activities in the subconscious mind are taking place; work is being done on the more difficult questions. By the time the easier questions are answered, answers to the more difficult ones will usually begin to come into consciousness. It is often just a question of waiting for recall to come to the memory.

You see, forcing ourselves to think hard to recall something usually doesn’t help. Chances are that the harder we think, the more difficulty we face in thinking of what we want to. Offering our mind time to work is what we are expected to do.

Problem

People 1.______ to recall what they are sure they know.

 

Solution

They are 2.______ not to try to recall it immediately. They can do something else for a while 3._____ of thinking hard about it.

 

4.______

It takes time for the subconscious activities to go to work to dig up a dim memory, in which case forcing oneself to recall can make the memory 5._____.

 

Example

Students find the preparatory method of great 6.______ in examinations. They, having read over the questions, first answer easy ones. 7._____, the subconscious activities are 8._____ to deal with harder ones.

9.______

People should offer their mind time to work so that a dim memory can be 10._____ up.

 

Grasshoppers are having to change their song — one of the iconic sounds of summer — to make themselves heard above the noise of road traffic, ecologists have discovered. The study, published in the British Ecological Society's journal Functional Ecology, is the first to show that human-made noise affects natural insect populations. Animals use sound to communicate for many reasons, including marking out territory, warning of predators and finding mates, and although previous research shows birds, whales and even frogs change their calls in noisy environments, the impact of human-made noise on insects has been neglected until now. Ulrike Lampe and colleagues from the University of Bielefeld in Germany caught 188 male bow-winged grasshoppers, half from quiet locations and half from beside busy roads. The grasshoppers use their song to attract mates.

The team then studied the differences in the two groups' songs in the laboratory. To encourage them to sing they exposed the males to a female grasshopper, and then recorded their courtship songs. Analysis of almost 1,000 recordings revealed grasshoppers living beside noisy roads produced different songs to those living in quieter locations.

According to Lampe: "Bow-winged grasshoppers produce songs that include low and high frequency components. We found that grasshoppers from noisy habitats increase the volume of the lower-frequency part of their song, which makes sense since road noise can mask signals in this part of the frequency spectrum(频谱)."

The team's findings are important because traffic noise could be upsetting the grasshopper's mating system(交配系统). "Increased noise levels could affect grasshopper courtship in several ways. It could prevent females from hearing male courtship songs properly, prevent females from recognizing males of their own species, or impair females' ability to estimate how attractive a male is from his song," Lampe explains.

Having discovered that human-made noise affects insect communication, the researchers now want to learn more about how the mechanism works, and whether the grasshoppers adapt to noise during their development as larvae(幼虫), or whether males from noisy habitats produce different songs due to genetic differences.

The bow-winged grasshopper is a common species in Central Europe. Adults occur mainly between July and September, preferring dry grasslands. Around 1.5 cm long, they vary in colour from green and browns to red and purple. The male's song consists of 2 second-long phrases that increase in amplitude (振幅) towards the end. The beginning of a phrase is characterized by slower ticking sounds that increase in speed and amplitude, leading to a buzzing sound towards the end of the phrase. A courtship song usually includes 2 phrases.

1.The author wrote the article to _________________.

A. introduce how grasshoppers make noises to attract mates.

B. raise the awareness of protecting bow-winged grasshoppers.

C. inform us of a recent discovery of ecological research.

D. warn us that human-made noise has changed ecological system.

2.Which of the following could be the main idea of the passage?

A. Bow-winged grasshoppers use their songs to communicate.

B. Grasshoppers change their songs to adapt to the noisy environment.

C. Grasshoppers’ songs include both low and high frequency components.

D. Bow-winged grasshoppers are a common species in Central Europe.

3.What does the underlined word “impair” in the fourth paragraph mean?

A. repair B. develop

C. weaken D. improve

4.Which of the following statements is true according the passage?

A. Road noise can cover the lower-frequency part of their song.

B. Animals make sounds only for the purpose of finding mates.

C. Grasshopper larvae learn to adapt to human-made noise.

D. Bow-winged grasshoppers grow up into adults in spring.

 

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