问题
选择题
下列过程中,属于动能转化为势能的是[ ]
A、雪撬从山坡上滑下
B、推开的弹簧门自动关闭
C、人造地球卫星从近地点向远地点运动
D、雪滴从空中落下
答案
答案:C
下列过程中,属于动能转化为势能的是[ ]
A、雪撬从山坡上滑下
B、推开的弹簧门自动关闭
C、人造地球卫星从近地点向远地点运动
D、雪滴从空中落下
答案:C
阅读下面对话,从方框内7个选项中选择5个恰当的句子完成此对话。
B: 小题1:__ A: What did you do there? B: I found out that the factory was pouring waste water into the river near it. 小题2:__. Lots of fish have died. A: 小题3:_. B: Do you think “Greener China” can do something? A: 小题4:__ . We can write a story about it to the TV station and the newspaper. B: 小题5:__ . Businessmen are afraid of newspapers and TV stations. |