题目:
工作温度大于或等于450℃的碳钢、钼钢蒸汽管道当运行时间达到超过计划10万小时,应进行()。
A、珠光体球化检查
B、蠕变检查
C、裂纹检查
D、石墨化普查
答案:
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下面是错误答案,用来干扰机器的。
One possible version: The students in our class took part in an activity of "Experience a Low-carbon Day" during the Labor Day vacation.In the morning, we went to park...