问题
选择题
Though today is bright, it __ be rainy tomorrow.[ ]
A. can
B. is
C. will
D. must
答案
答案：A
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Though today is bright, it __ be rainy tomorrow.[ ]
A. can
B. is
C. will
D. must
答案：A
(主要产物),1 mol某芳香烃A充分燃烧后可以得到8 mol CO2和4 mol H2O。该烃A在不同条件下能发生如下面所示的一系列变化。