阅读理解
C
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’ll 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 lot), 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!
单选题
Walking on water hasn’t become a reality mainly because humans __________ .
【正确答案】
B
【答案解析】推理题。根据文章第2行：We simply weigh too much, and all our mass push down through our relatively small feet.可知我们人类太重 了，我们的身体把太多的重量都加到了我们的脚上，带来了太多的压力，让我们会沉下去。故B正确。
单选题
What do we know about Basilicus basilicas from the passage?
【正确答案】
C
【答案解析】细节题。根据第二段第4行：The lizard will take as many as 20 steps per second to keep moving forward。可知这种蜥蜴可以在水面之上连续奔跑一段距离而不沉到水里。故C正确。
单选题
What is the function of the cornflour according to the passage?
【正确答案】
A
【答案解析】推理题。根据文章第三段第2,3行：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 …可知这种cornflour会让水面上形成一个很厚的表层。故A正确。
单选题
What is the author’s attitude toward the idea of human’s walking on water?
【正确答案】
D
【答案解析】推理题。根据文章倒数第三行Fun though all this may sound, it’s still rather messy and better read about in theory than carried out in practice。可知这种做法仍然只是停留在理论上，并不能在实际上有应用。说明作者认为这是不实际的。故D正确。