临时用电设备在5台以下和设备总容量在50KW以上者，应制定安全用电技术措施和电气防火措施。
参考答案：错
It's already 10 o'clock. I wonder how it _____ that she was two hours late on such a short trip. [ ]
A. came over
B. came out
C. came about
D. came up
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