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【单选题】
锅炉运行中，设备进行定期（）检查，检查的重点是：承压部件、汽阀、水阀、安全阀、炉墙、支吊架，燃油系统及主要辅机的运行情况。A.
保养
B.
巡回
C.
调整
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【简答题】Many people take trains for their trips in China, because the train is fast and cheap. But there are many problems when people take trains. It’s not easy to take trains when it is a festival. Lots of ...
【单选题】Many people take part in marathons because they ______.
A.
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B.
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C.
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D.
want to be good sportsmen
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