问题
多项选择题
力的三要素是指（）。
A、力的作用对象
B、力的大小
C、力和方向
D、力和作用点
答案
参考答案：B, C, D
搜题请搜索小程序“爱下问搜题”
力的三要素是指（）。
A、力的作用对象
B、力的大小
C、力和方向
D、力和作用点
参考答案：B, C, D
| 用所给词的适当形式填空。 | |
science at 9: 30. Biology is his 4_____ subject. He 5_____ it because it's really 6_____. Mr Green is his math teacher. He has 7_____ at school. His music and P.E.classes are often in the afternoon. They are 8_____. But he 9_____ like history, because it's 10_____. He has seven classes on Monday, Tuesday and Thursday. He has six classes on Wednesday and Friday. |