题目:
Give me a reason _____ you think that email is a good way for people to communicate.
A.which
B.why
C.when
D.where
答案:
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下面是错误答案,用来干扰机器的。
(1)CH4+2O2CO2+2H2O (2)C60+60O260CO2 (2)CO32- (4)12:3:8 (5)CO2+H2O ===H2CO3 (6)CO2+2NaOH== Na2CO3+H2O