螺纹通端工作塞规的中径偏差由（）来计算，而螺纹通端工作环规的中径偏差由（）来计算。
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波峰焊焊接前，对印制板预热的目的是防止元件突受高热而损坏，同时提高了助焊剂的活化。
A. 正确
B. 错误
有哪些情况审批行可以依法注销商业银行、信用社代理支库业务资格？
对于公用配电变压器停电，采取负荷转移或其他措施未导致所供低压用户停电的情况，（）。
You are on a cargo vessel carrying toluol in bulk in portable tanks. Which is a requirement for pumping the toluol? （）
A. Hose connections to the tank must be made with a minimum of three bolts
B. There must be water pressure on the fire main
C. You must shut down if another vessel comes alongside
D. If transferring at anchor，you must display a red flag by day and a red light at night
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