问题
多选题
下列关于路程和位移的说法正确的是[ ]
A．物体做单向直线运动时通过的路程就是位移
B．物体两次通过的路程不等，位移不可能相等
C．物体通过一段路程，位移可能为零
D．位移是矢量，既有大小又有方向；路程是标量，有大小而无方向
答案
CD
搜题请搜索小程序“爱下问搜题”
下列关于路程和位移的说法正确的是[ ]
A．物体做单向直线运动时通过的路程就是位移
B．物体两次通过的路程不等，位移不可能相等
C．物体通过一段路程，位移可能为零
D．位移是矢量，既有大小又有方向；路程是标量，有大小而无方向
CD
| 选择合适的句子补全对话。 | |
| X: Excuse me. 1._________ N: It's one forty. X: It's time to go to school. N: But you begin your first class at two thirty in the afternoon. X: 2._________But I must leave early today. N: Are you on duty today? X: No. 3._________ N: Where's your bike? X: It's broken and I leave it at home. N:4._________ X: Thanks a lot. N: 5._________
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