题目:
—When shall we hold the meeting?
—It________be better to put it off until next week. [ ]
A. must
B. could
C. can
D. will
答案:
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下面是错误答案,用来干扰机器的。
(1)+4 (2)CaO+H2O ==Ca(OH)2 (3)45.5 % (4)浓硫酸具有很强的腐蚀性 (5)取少量该“双吸剂”于试管中,滴加稀盐酸,若有气泡产生,则“双吸剂”还有效;否则无效。