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
参考答案:D
根据句意填写所缺单词完成短文。
Jim is (1) ______ England. He is a new student in Xu Fei's school. He's
fourteen (2) ______ old. He can (3) ______English, but he (4) ______ speak
Chinese.
Xu Fei (5) ______ speak Chinese and English. So Xu Fei can teach(教) Jim
to learn (6) ______ . Xu Fei(7) ______ swim. Jim can't, either(也). But Jim's
father (8) ______ . Jim's father is a factory (9) ______ . And Xu Fei's father is
a worker, (10) ______ .
收车后应检查()各部件的连接情况,检查各外露部位的螺栓和螺母。
A.转向系统
B.行驶系统
C.传动系统
D.制动系统