Question

语篇理解

　　Atoms are all around us. They are the bricks of which every thing is made. Many millions of atoms of atoms are contained in just one grain of sand, but despite their small size they are very important. The way in which an everyday object behaves depends on what kinds of atoms are in it and how they act.

　　For instance, you know that most solid objects melt if they get hot enough. Why is this? It is the effect of the heat on the objects' atoms. All atoms move constantly. When they are hot, they move faster.

　　Usually the atoms in an object hold together and give the object its shape. But if the object grows hot, its atoms move so fast that they break the force that usually holds them together. They move out of their usual places so that the object loses its shape. Then we say that the object is melting.

(1)The way in which an object behaves depends on the ______.　

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A．kids of atoms in it　　 　B．number of atoms in it

C．way its atoms behave　　　D．both a and C

(2)Atoms in an object move ______.

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A．at all times

B．only when the object is heated

C．whenever they grow hot

D．unless the object has melted

(3)Heating an object will affect　

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A．the movements of its atoms

B．the speed of its atoms

C．the shape of its atoms

D．both A and B

(4)An object holds its shape because its atoms ______.　

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A．usually hold together

B．move very fast

C．are very hot

D．are not moving

(5)When its atoms leave their usual places we say that an object is ______.

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A．shrinking　　　　  　B．expanding

C．changing places　　　D．melting

Answer 1

答案：D;A;A;A;D