题目内容
HXD3B型电力机车主断路器采用TDZ1A-10/25型空气断路器控制机车高压电路的通断。
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HXD3B型电力机车的接地开关只能在降弓和切断受电弓起源之后才能置于接地位，用以保证机车乘务员的人身安全。
HXD3型电力机车变压器的储油柜集成在机车的冷却塔里，从而减小了变压器的体积。
执行以下代码后变量 i 的值是( )。for(i=1;i++<4;);i=i+5;
Listen to a short passage on success and fill in the missing information.[音频]We cannot travel every path. Success must be won along one line. We must make our business the one life purpose to which every other must be _____1____. I hate a thing done by halves. If it be right, do it boldly. If it be wrong, leave it undone. The men of history were not perpetually looking into the mirror to make sure of their own size. ___2_____ in their work they did it.
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