除主要脱硫方法外的其他方法按其工艺类型还可分为（）种。
A.三
B.四
C.五
D.六
参考答案：D
It will be long she sees Mr. White again at Beijing, business has just started in Switzerland.
A．after; who
B．since; who
C．when; whose
D．before; whose
我国海船船员考试发证等规则的制定，是以（）公约为主要依据的。
A．SOLAS
B．STCW
C．MARPOL
D．LL
