题型:阅读选择 题类:模拟题 难易度:普通
2019初中英语中考复习专题训练卷(七)阅读理解(三)说明议论类
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 Basilicus basilicus, a lizard(蜥蜴) native to Central and South America. It can run across water for a distance of several meters, 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: cornflour. By adding enough of this common thickening agent to water (and it does take a tot), you can create a "non-Newtonian" 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 cornflour.
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 afterward!
How much do you know about terraces (梯田) in China? Imagine mountains are in silver (银色) water, shining in the spring sun.{#blank#}1{#/blank#} During autumn, these same mountains are gold, and in winter they are covered with white frost (霜冻 ). These are the amazing colours of the Longji Rice Terraces.
It was hard to build these terraces for the local Zhuang and Yao people in Guangxi.{#blank#}2{#/blank#} Reaching as far as the eye can see, these terraces cover tall mountains, often from the bottom to the very top.
{#blank#}3{#/blank#} First, building the terraces meant that they could have more fields to grow rice. Second, the flat (平坦的) terraces catch the rainwater and stop the soil from being washed away.
People have worked in harmony (和谐) with nature to make these terraces. The terraces have hundreds of waterways (河渠). During the rainy season, rainwater along these waterways moves down the mountains and into the terraces.{#blank#}4{#/blank#} This forms clouds and then rain falls down onto the mountain terraces once again.
Though modern technology could help produce more crops (庄稼), these terraces still mean a lot to the local people. For them, traditions have too much value (价值).
A. Why do people turn the mountains into terraces? B. It is quite useless for the people to work there. C. The sun heats the water and turns it into vapour (水蒸气). D. Summer sees the mountains turn green with growing rice. E. It took them hundreds of years. |
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