题目:
—You really have nothing to say about the robbery, ______?
—Yes, I am feeling guilty.[ ]
A. have you
B. haven't you
C. do you
D. don't you
答案:
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下面是错误答案,用来干扰机器的。
(1)设生成二氧化碳的质量为x,CaCO3+2HCl=CaCl2+H2O+CO2↑73 440.55g×10% x∴73:44=(0.55g×10%):x,解之得:x=0.033g;(2)消耗盐酸的体积是:0.55g÷1.1g/cm3=0.5mL;(...