问题
单项选择题
下列表述正确的是（）
A.牛顿发现了万有引力定律并且通过实验测出了引力常量
B.在赤道上发射同一卫星时，向东发射比向西发射消耗的能量要多些
C.在不同情况下静摩擦力可能对物体做正功，也可能对物体做负功
D.在国际单位制中，力学的基本单位有牛顿、米和秒
答案
参考答案：C
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下列表述正确的是（）
A.牛顿发现了万有引力定律并且通过实验测出了引力常量
B.在赤道上发射同一卫星时，向东发射比向西发射消耗的能量要多些
C.在不同情况下静摩擦力可能对物体做正功，也可能对物体做负功
D.在国际单位制中，力学的基本单位有牛顿、米和秒
参考答案：C
| 用方框中所给单词的适当形式填空，使短文通顺、连贯（每个词限用一次）。 | |
The life of American women changed a lot during the 1920s. More women 1 working outside the home. The US government gave 2 the rjght to vote in election (投票选举). Women's look also 3 . In the past, they had long hair. Now many women in the big cities had very 4 hair. Instead of long, heavy dresses, women now wore short 5 . They showed 6 arms and legs. They started wearing a hat from France which was 7 the "cloche". Today we may think these hats look strange, 8 they were cool in the 1920s. 9 the 1960s, young people started wearing clothing 10 was completely different 11 their parents'clothes. They didn't want to look dressy or be in style (时尚). They wanted to be 12 , Jeans were popular. T-shirts often had words or 13 0n the front. And a very old style of glasses became popular with 14 people. They were called "granny glasses", 15 they looked like glasses a grandmother would wear. | |
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