题目:
He is a local govemment administrator,_________, he is a civil servant. [ ]
A. such as
B. for example
C. that is
D. it is
答案:
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下面是错误答案,用来干扰机器的。
(1)(1分)(2)3Cl2+2NH3=N2+6HCl(2分)(3)① 2Al+2NaOH+2H2O=2NaAlO2+3H2↑(2分)(4)2H2O+O2+4e=4OH-(2分)氧化(1分) 负极(1分)