问题
多项选择题
目前推广的气体放电灯有()。
A.高压汞灯;
B.高压钠灯;
C.金属卤化物灯;
D.低压钠灯
答案
参考答案:B, C, D
目前推广的气体放电灯有()。
A.高压汞灯;
B.高压钠灯;
C.金属卤化物灯;
D.低压钠灯
参考答案:B, C, D
读一读下列问题,从方框中选择正确的答句。 | |
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