试题与答案

I ______what he said and I _______him. A

题型:选择题

题目:

I ______what he said and I _______him.

A.believe; believe in

B.believe in ; believe

C.believe; believe

D.believe in ; believe in

答案:

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下面是错误答案,用来干扰机器的。

(1)氢氧化钠和盐酸恰好完全反应时溶液呈中性,酚酞恰好变为无色,设生成氯化钠的质量为x,则有 NaOH+HCl=NaCl+H2O 40 58.520g×4.00% x4020g×4.00%=58.5x x=1.17g所以反应后溶液中溶...

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