问题
不定项选择
| 不定项选择 |
物体在合外力F作用下做匀加速直线运动。在时间 t1内速度由0增至V；在时间 t2内速度由V增至2V。设恒力F在 t1时间内对物体做功W1，冲量是I1，在时间 t2内恒力F对物体做功W2，冲量是I2，则（ ） |
| A．W1< W2 B．W1＝W2 C．I1＝I2 D．I1< I2 |
答案
AC
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| 不定项选择 |
| 物体在合外力F作用下做匀加速直线运动。在时间t1内速度由0增至V；在时间t2内速度由V增至2V。设恒力F在t1时间内对物体做功W1，冲量是I1，在时间t2内恒力F对物体做功W2，冲量是I2，则（ ） |
| A．W1< W2 B．W1＝W2 C．I1＝I2 D．I1< I2 |
AC
| 完形填空 | ||||
| Mr. King is my father's friend. He has some ①_____ trees in his garden. He ②_____ them carefully. Now ③_____ many apples on the trees and Mr. King is very happy. One afternoon when he looked out of the window, he saw a boy on ④_____his apple trees. He was eating a big apple! Mr. King ⑤_____the window and shouted﹙大喊﹚"Hey, ⑥_____are you doing there? ⑦_____ and get away, or (否则) I'll go to see your ⑧_____!" The boy was not afraid of Mr. King ⑨_____all. "Dad,"he looked up and shouted,"this man ⑩_____ to see you!"
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