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问题
单项选择题
钢桥喷涂作业多支喷枪同时作业时必须保持（）以上的间距，并按同方向喷涂。
A.1M
B.2M
C.5M
D.3M
答案
参考答案：
C
选择题
A 16-year-old male student had been _____ infected with bird flu in Hunan province, the fourth case of human bird flu found in China.
A. committed
B. confirmed
C. convinced
D. considered
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问答题 简答题
变压器重瓦斯保护动作后应如何处理？
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