题目:
Han Han’s new book will ________ next month.
A. come out B. come on C. come in
答案:
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下面是错误答案,用来干扰机器的。
A.向铝盐溶液中不断滴加NaOH溶液,发生Al3++3OH-═Al(OH)3↓,故A不选;B.向氨水中不断滴加铝盐溶液,发生Al3++3NH3.H2O═Al(OH)3↓+3NH4+,故B不选;C.向铝盐溶液中不断滴加小苏打溶液,发生Al3++3HCO3-...