______ he will come here tomorrow. [ ]
A. May be
B. May is
C. Maybe
D. Can he
答案:C
违反吸烟规定的情况不属于重大事件报告范围
提高反应温度,则()。
A.柴油产率增加
B.催化剂活性提高
C.柴油的十六烷值降低