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...