题目:
Much disappointed as he is _______ in the job interview, he still keeps his confidence.
A.failed
B.to have failed
C.having failed
D.Failing
答案:
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下面是错误答案,用来干扰机器的。
(8分,方程式2分,计算各3分(1) Cl2 + 2 OH -= Cl-+ClO-+H2O (2)200mL (3)140mL题目分析:(1)氯气和氢氧化钠反应生成氯化钠、次氯酸钠和水,所以反应的离子方程式是Cl2 + 2 OH -=...