A

　　Even if

　　you are a good high-jumper, you can jump only about seven feet off the ground. You cannot jump any higher because the earth pulls you hard. The pull of the earth is called gravity.

　　You can easily find out the pull of the earth. If you weigh yourself, you will know how much gravity is pulling you.

　　Since there is gravity, water runs down hill. When you throw a ball into the air, it falls back down. Because of gravity, you do not fall off the earth as it whirls (旋转) around.

　　Then, can we get away from the earth and go far out into space? Now you can do it, because spaceships have been invented. Then spaceship will go so fast that it can escape (逃出) the earth’s gravity and carry you into space.

　　31. In this passage, the word “gravity” means_______.

　　A. the pull of everything.

　　B. the force of attraction(吸引) among objects.

　　C. the force which attracts objects towards the centre of the earth

　　D. the force which attracts the earth towards the sun.

　　32. When you slip(滑) you always fall to the ground because________

　　A. the earth always turns round.

　　B. the earth has gravity

　　C. the earth’s gravity is greater than your weight.

　　D. you are careless.

　　33. Gravity is strong that_______

【陕西省渭南市希望高中2017-2017学年高一上学期期中考试英语试题Word版含答案】相关文章：

★ 山东省济宁市金乡一中2017-2017学年高一上学期期中考试 英语 Word版含答案

★ 陕西省宝鸡中学2017-2017学年高一上学期期中考试英语试题

★ 内蒙古赤峰市乌丹一中2017-2017学年高一上学期期中考试英语试题Word版含答案

★ 吉林省长春市第二中学2017-2017学年高一上学期期中考试英语试题Word版含答案

★ 山东省临沂市重点中学2017-2017学年高一上学期期中考试 英语 Word版含答案

★ 江西省抚州市临川十中2017-2017学年高一上学期期中考试英语试题

★ 云南省保山市腾冲八中2017-2017学年高一上学期期中考试英语试题

★ 山西省忻州一中2017-2017学年高一上学期期中考试英语试题 Word版含答案

★ 广东省揭阳一中2017-2017学年高一上学期期中考试英语试题（Word版含答案）

★ 山东省实验中学2017-2017学年高一上学期期中考试 英语 Word版含答案