问题
选择题
如图，对于水中正在上升的气泡，下列说法正确的是
A．气泡受到水的压强变小、浮力变小
B．气泡受到水的压强变小、浮力变大
C．气泡受到水的压强变大、浮力变小
D．气泡受到水的压强变大、浮力变大
答案
答案：B
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如图，对于水中正在上升的气泡，下列说法正确的是
A．气泡受到水的压强变小、浮力变小
B．气泡受到水的压强变小、浮力变大
C．气泡受到水的压强变大、浮力变小
D．气泡受到水的压强变大、浮力变大
答案：B
Jogging（慢跑）became popular about twenty years ago and has been a favorite way of keeping fit for lots of people. People like to do it. Both teenagers（青少年）and people in their seventies or eighties can jog. They can jog anywhere—around college campuses（校园）, around houses or in parks. Jogging is good for health. It is good for lungs and hearts. It is easy and convenient（方便）. 根据短文内容，填写下列表格。（每空一词，10分）
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