题目内容

某队请求暂仃和换人时,应向那个裁判员提出()

A. 第一裁判
B. 第二裁判
C. 记录台

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A beam of light will not bend round corners unless ________ (make) to do so with the help of a reflecting device

Matter is the name ________ (give) to everything which has weight and occupies space.

如果队员意外地将球投入该队的本方球篮,对方得分有效()

he teacher told them since light ________ (travel) faster than sound,lightning ________ (appear) to go before thunder.

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