问题
单项选择题
物体有保持原来运动状态的性质，称之为惯性，可以看出( )
A．运动速度大的物体比运动速度小的物体难以停下来，所以运动速度大的物体具有较大的惯性
B．物体受的力越大，要它停下来就越困难，所以物体受的推力越大，则惯性越大
C．物体的体积越大，惯性越大
D．物体所含的物质越多，惯性越大
答案
参考答案：D
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物体有保持原来运动状态的性质，称之为惯性，可以看出( )
A．运动速度大的物体比运动速度小的物体难以停下来，所以运动速度大的物体具有较大的惯性
B．物体受的力越大，要它停下来就越困难，所以物体受的推力越大，则惯性越大
C．物体的体积越大，惯性越大
D．物体所含的物质越多，惯性越大
参考答案：D
| 完形填空。 | |||
| Look at the picture. It's a picture 1 a park. 2 the tree 3 some birds. Are there 4 boys under it? Yes, there are. They're 5 English books. 6 girls are there near the river? There're six. Are they 7 games? Yes, they are. 8 that girl behind the tree? That's Kate. She's 9 a red skirt. She's 10 tea. | |||
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