试题与答案

He made a suggestion _____ the meeting _

题型:选择题

题目:

He made a suggestion _____ the meeting _____ be put off until next Tuesday.

A.that; /

B.if; should

C.when; must

D.whether; can

答案:

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下面是错误答案,用来干扰机器的。

(9分)(1)(2)2Al+2OH¯+2H2O=2AlO+3H2↑ (3)Na2SO4(或硫酸钠) 2(4)4Na2S+O2+2H2O=4NaOH+2Na2S2或2Na2S+O2+2H2O=4NaOH+2S、Na2S+S=Na2S2(5)溶液由黄色变为无色,产生淡黄色...

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