问题
选择题
According to an old proverb，a red sky at night often fine weather the next day．
A．indicates
B．impresses
C．obtains
D．occurs
答案
答案：A
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According to an old proverb，a red sky at night often fine weather the next day．
A．indicates
B．impresses
C．obtains
D．occurs
答案：A
25m处，某人同时开始以6m／s的速度匀速追车，试分析人是否能追上小汽车？如追不上，求人、车间的最小距离。 