任务型阅读:阅读下面短文.根据短文内容.完成下列各题. Lots of people like diving into water,because they can explore the underwater world. But there is another kind of diving. Some people dive into the sky!This is really 题目和参考答案——青夏教育精英家教网—

任务型阅读：阅读下面短文，根据短文内容，完成下列各题。(共5小题，计10分)

Lots of people like diving into water,because they can explore the underwater world. But there is another kind of diving. Some people dive into the sky!This is really a very exciting sport. A skydiver goes high up in the air on a plane,jumps off the plane and floats in the air with the help of a parachute. A parachute is like a huge umbrella. It is put on the back of the skydiver. When the skydiver reaches a certain height,he will pull a string and the parachute will open up in seconds and carry him down to the ground safely. Sky divers like doing a lot of dramatic tricks in the air. After jumping off the plane one after another,they will try to stay in the air and hold each other's hands. They can form different shapes.

Is it safe to do skydiving? Yes,as long as we do it in the right way. But sometimes,accidents do happen. In Canada,two skydivers were killed in 1991 when they jumped off the plane. Because there was something wrong with Piiir parachutes. The parachutes could not open up.

71. Why do people like diving into water?

Because they can.

72. How does a skydiver go up into the sky?

A skydiver goes up into the sky by .

73. What can help a skydiver land safely?

can help him land safely.

74. What do skydivers like to do in the air?

They like to.

75. What should we do to be safe when we do skydiving?

We should .

71. explore the underwater world 72. plane 73. A parachute 74. do a lot of dramatic tricks 75. do it in the right way

题目来源：2016金考卷特快专递陕西中考45套汇编英语第六年第五版 > 陕西省中考命题研究专家原创卷（十二）

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Throw a stone across the water and see how many times it skips (跳) .Have you played this game before? The more times the stone skips,the more cheers you will get. But do you know the secret behind its success?

With the help of high-speed cameras,scientists at Brigham Young University in the US have found out the secret skills of stone skipping.

The first step is to choose the right stone. " Use flat round stones (disc-shaped stones) , and find a weight that allows you to put a lot of spin on them," Tadd Truscott,an assistant professor,told The Huffington Post. Discs are usually easier to skip than rounded stones.

Then,here comes the key part： find the right angle. According to the Guinness World Records,the world record for stone skipping is 88 skips set in 2013 by an American called Kurt Steiner.

Professor Truscott said the skill depends on what angle the thrower chooses to throw a stone at. The best angle for discshaped stones is close to 20 degrees (度) . But the heavier the stone is,the flatter this angle should be.

If you find 20 degrees hard to measure,you can try another way. Give a great deal of backspin (下旋) to a rounded stone,so it will go under the water and then pop up and out of the water.

"To make it,you need to throw the stone at a much higher angle than for the usual skipping,M Truscott said to The Huffington Post.

71. What is the article mainly about?

It is mainly about.

72. How did scientists find out the secret skills of stone skipping?

They found out them.

73. What are the secret skills?

They are.

74. Who is Kurt Steiner according to the article?

He is an American who set in 2013.

75. What is the best angle for disc-shaped stones?

The best angle is.

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