题目
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．(1)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 earthD． the force which attracts the earth towards the sun．(2)When you slip(滑) you always fall to the ground because___A． the earth always turns round．B． the earth has gravityC． the earth's gravity is greater than your weight．D． you are careless．(3)Gravity is strong that___．A． it can throw a ball into the air．B． it makes you jump only seven feet．C． it can let you fly away from the earth．D． it can keep everything on earth．(4)Because of gravity，___A． water flows everything．B． we can go everywhere by ship．C． water always flows downwards．D． fish can live in water．(5)We can get away from the earth by spaceship because___．A． the spaceship goes very fast．B． the earth can't pull the spaceship．C． the spaceship has a strong force．D． the spaceship can jump higher than other things．
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．
(1)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．
(2)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．
(3)Gravity is strong that___．
A． it can throw a ball into the air．
B． it makes you jump only seven feet．
C． it can let you fly away from the earth．
D． it can keep everything on earth．
(4)Because of gravity，___
A． water flows everything．
B． we can go everywhere by ship．
C． water always flows downwards．
D． fish can live in water．
(5)We can get away from the earth by spaceship because___．
A． the spaceship goes very fast．
B． the earth can't pull the spaceship．
C． the spaceship has a strong force．
D． the spaceship can jump higher than other things．
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．
(1)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．
(2)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．
(3)Gravity is strong that___．
A． it can throw a ball into the air．
B． it makes you jump only seven feet．
C． it can let you fly away from the earth．
D． it can keep everything on earth．
(4)Because of gravity，___
A． water flows everything．
B． we can go everywhere by ship．
C． water always flows downwards．
D． fish can live in water．
(5)We can get away from the earth by spaceship because___．
A． the spaceship goes very fast．
B． the earth can't pull the spaceship．
C． the spaceship has a strong force．
D． the spaceship can jump higher than other things．
题目解答
答案
(1)C 词义猜测题，根据The pull of the earth is called gravity．地球的拉力被称为重力．即将物体吸引向地心的力．故选C．
(2)B 细节推理题，Because of gravity， you do not fall off the earth as it whirls (旋转) around．因为重力，在地球旋转时你不会从地球上掉下去．判断在你滑行时你总会落地是因为地球的重力拉着你．故选B．
(3)B 细节理解题，根据Even if you are a good high-jumper， you can jump only about seven feet off the ground．即使你跳得很高，但你也只能跳到离地面大约7英尺处．故选B．
(4)C 细节理解题，根据Since there is gravity， water runs down hill．因为有重力，水流向山下．故选C．
(5)A 细节理解题，根据Then spaceship will go so fast that it can escape (逃出) the earth's gravity and carry you into space．然后宇宙飞船特别快它可以逃出地球的重力并带你进入太空．故选A．
(2)B 细节推理题，Because of gravity， you do not fall off the earth as it whirls (旋转) around．因为重力，在地球旋转时你不会从地球上掉下去．判断在你滑行时你总会落地是因为地球的重力拉着你．故选B．
(3)B 细节理解题，根据Even if you are a good high-jumper， you can jump only about seven feet off the ground．即使你跳得很高，但你也只能跳到离地面大约7英尺处．故选B．
(4)C 细节理解题，根据Since there is gravity， water runs down hill．因为有重力，水流向山下．故选C．
(5)A 细节理解题，根据Then spaceship will go so fast that it can escape (逃出) the earth's gravity and carry you into space．然后宇宙飞船特别快它可以逃出地球的重力并带你进入太空．故选A．