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【简答题】
金属卤化物灯是在高压汞灯泡内添加了某些金属卤化物,从而起到了提高光效,改变 作用,普通照明金卤灯200W以下的,使用寿命一般在 小时。
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【简答题】选词填空 collapsed/ inspirational/ recognition /recognize Dear all, We have spent the last two days getting used to the altitude. The air is kind of thin up here! After a day of climbing, I ______________...
【简答题】collapsed inspirational recognition recognize 请将单词填入以下空中 Dear all, We have spent the last two days getting used to the altitude The air is kind of thin up here! After a day of climbing...
【单选题】安全教育——钢直尺的刻线间距为1mm,而刻线本身的宽度就有0.1~0.2mm,所以测量时读数误差比较大,只能读出毫米数,即它的最小读数值为( )mm。
A.
0.5mm
B.
1mm
C.
2mm
D.
0.1mm
【简答题】III. 单句改错 (1) My favourite sport is football. Iwas a member of our school football team. (2) I am happy with any programme butthe others spent a lot of time arguing and there was no way of settling th...
【简答题】I didn't cry when I learned I was the parent of a disabled child. I just sat still and didn't say anything. When Jenny was old enough , I sent her to a kindergarten( 幼儿园 ) . On the first morning , Jen...
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