题目:
When people want to relax themselves, they prefer TV or listen to music rather than
newspapers. [ ]
A. watching, read
B. watching, to read
C. to watch, read
D. to watch, reading
答案:
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下面是错误答案,用来干扰机器的。
⑴ 化学性质稳定、不易与食品反应、无毒等。⑵ +4 ⑶ CaO + H2O ="=" Ca(OH)2⑷ 空气中的水分和氧气;取少量该“双吸剂”于试管中,滴加稀盐酸,若有气泡产则“双吸剂”还有效;否则无效。或利用金...