题目内容

(Para. 10) 5 What other changes were they trying to make in addition to becoming more economical with power and water usage?

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下列不属于保存 PS操作过程的文件类型是?

A. .PDD
B. .PSD
C. .GIF

y=cotx,y'=____

干簧管只对磁性较强的物体起作用。

A. 对
B. 错

当电涡流线圈与被测体的距离X变小时,电涡流线圈的电感量L也随之增加,引起LC振荡器的输出频率变大。

A. 对
B. 错

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