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问题 单项选择题

探伤车双通道脉冲接收器的作用是（）。

A、传递轮探头接收到的回波并将其放大

B、产生超声波

C、产生电压激励信号，驱动轮探头中超声波换能器，放大超声波探头接收到的回波

D、发射超声波

答案

参考答案：C

填空题
用方框中所给单词的适当形式填空，使短文正确、通顺。（每词限用一次）
how,  either,  be,  danger,  feel,  with,  well ,  lose,  swim,  weather
Summer is coming. The 小题1:_______ becomes hotter and hotter. A lot of people like小题2:_______ in the swimming pools or in the sea. They think water makes them 小题3:______ cool. But some people are not careful enough. They often think they can swim 小题4: ______ than others and they don't have to worry about anything. So these years, many accidents happened and some people小题5:______ their lives(生命). Most of them were students. As we all know, safety is the most important. Do you know 小题6: ______ to protect(保护)yourself? To protect yourself, you must be careful. Remember not to swim in a 小题7:______ place. Don't swim alone, and when you sec a “No Swimming” sign, don't swim, 小题8:_______. Of course, you can swim 小题9: _______ someone who can keep you safe. If you remember these, swimming 小题10:_______ safer.
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单项选择题

个人取得的揽储奖金收入，属于个人所得税征税对象中的( )。

A．偶然所得

B．财产转让所得

C．其他所得

D．利息所得
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