Question

【题目】The idea of being able to walk on water has long interested humans greatly. Sadly, biological facts prevent us ever accomplishing such a thing without artificial aid—we simply weigh too much，and all our mass pushes down through our relatively small feet, resulting in a lot of pressure that makes us sink.

However, several types of animals can walk on water. One of the most interesting is the common basilisk Basilicusbasilicus, a lizard (蜥蜴) native to Central and South America. It can run across water for a distance of several metres, avoiding getting wet by rapidly hitting the water's surface with its feet. The lizard will take as many as 20 steps per second to keep moving forward. For humans to do this, we'd need huge feet that we could bring up to our ears in order to create adequate “hitting”．

But fortunately there is an alternative: corn flour. By adding enough of this common thickening agent to water (and it does take a lot), you can create a “nonNewtonian” liquid that doesn't behave like normal water. Now, if the surface of the water is hit hard enough, particles(粒子) in the water group together for a moment to make the surface hard. Move quickly enough and put enough force into each step, and you really can walk across the surface of an adequately thick liquid of corn flour.

Fun though all this may sound, it's still rather messy and better read about in theory than carried out in practice. If you must do it, then keep the water wings handy in case you start to sink—and take a shower afterwards!

【1】What do we know about Basilicusbasilicus from the passage?

A. It is light enough to walk on water.

B. Its huge feet enable it to stay above water.

C. It can run across water at a certain speed.

D. Its unique skin keeps it from getting wet in water.

【2】What is the function of the corn flour according to the passage?

A. To create a thick liquid.

B. To turn the water into solid.

C. To help the liquid behave normally.

D. To enable the water to move rapidly.

【3】What is the author's attitude towards the idea of humans' walking on water?

A. It is risky but beneficial.

B. It is interesting and worth trying.

C. It is crazy and cannot become a reality.

D. It is impractical though theoretically possible.

Answer 1

【答案】

【1】C

【2】A

【3】D

【解析】人类有一个一直感兴趣但一直未能实现的愿望：水上行走。不能实现的原因是“生物性局限”。本文主要介绍了一种理论上可行实际上难以实现的人类水上行走的方法：借助玉米粉（cornflour）增加水面浓度。

【1】细节理解题。根据第二段“It can run across water for a distance of several meters, avoiding getting wet by rapidly hitting the water’s surface with its feet”一句可知，这种蜥蜴能在水面行走是因为速度快（每秒钟达到20步）。选择 C

【2】细节理解题。第三段介绍了用一定稠密度的玉米粉末来增加水面厚度的方法，它可以使人类在水上行走。 “this common thickening agent”明确这是一种“常见的增稠剂”。选择A。

【3】推理判断题。根据短文最后一段中的“…it's still rather messy and better read about in theory than carried out in practice.”(这个方法还是很没道理，可以权当高级理论谈论但不宜付诸实施)，且最后说如果有人一定要尝试的话，最好配备救生设施以防不测。由此说明用玉米粉末铺垫水面来行走理论上可行，实际上却无法操作。故选D。