题目

在“探究运动变化和力的关系”实验中,装置如图(1)所示。 (1) 为了得出科学结论,三次实验中小车都从相同斜面上的(相同/不同)位置处由静止自由释放。 (2) 下面是记录实验情况的表格,请将表格内(a)处的项目内容补充完整。 (3) 小车进入水平面后,在运动过程中受到的一对平衡力是和。 (4) 在此实验的基础上,进一步推理可得:若小车不受阻力,则小车会在水平面上。 (5) 这个探究活动整体采用的阅读短文,从方框中选择适当的单词填空。Anna comes from Russia. She is 17 years old. She’s going to stay with the Black family for a year. Anna comes to England because she wants to study English. She helps Mrs. Black(1)______________ housework and goes to English (2) _______________ every Wednesday and Friday afternoon.Anna is now in London. Everything is new to her. She finds life is (3) _______________from that in Moscow. Some things are great in London, but many things are not so nice.  The shops are (4) _____________ in London than those in Moscow. But it’s very expensive to (5) ____________ breakfast in London.
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