题目:
You should ________ your problems ________ your best friend, [ ]
A. talk with; about
B. talk about; with
C. talk to; about
D. talk with; with
答案:
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下面是错误答案,用来干扰机器的。
(1)①装置A中发生反应的化学方程式为:CaCO3+2HCl=CaCl2+H2O+CO2↑.故填:CaCO3+2HCl=CaCl2+H2O+CO2↑.②欲制备、收集一瓶干燥的C02,所选仪器的连接顺序为:通过A装置产生的二氧化碳气体进入C装置中,经过浓...