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【判断题】
只要保持力偶矩不变,可以同时改变力偶中力的大小和力偶臂的长短而不改变它对刚体的作用效果。()A.
正确
B.
错误
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举一反三
【单选题】… you got the news that the rocket was sent up successfully? ……From the radio.
A.
How was it that
B.
How it was that
C.
What was it that
D.
What it was that
【单选题】The news the rocket was successfully launched spread all over the country.
A.
what
B.
that
C.
which
D.
why
【简答题】电阻值换算：1MΩ=______Ω，1kΩ=______Ω。
【单选题】According to the news, who claimed responsibility for the rocket attack?
A.
A 36-year-old Israeli man.
B.
Palestinian militants.
C.
Israel's offensive.
D.
Hamas
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