— I haven't finished my essay because the computer broke down when I was downloading the

required data last night.

— Really! You could have turned to me. I         mine. [      ]

A. didn't use

B. won't use

C. hadn't used

D. wasn't using

下列叙述正确的是（    ）

A．盐酸．硝酸和硫酸均有强氧化性和强酸性

B．Fe分别与氯气和稀盐酸反应所得氯化物相同

C． K．Zn分别与不足量的稀硫酸反应所得溶液均呈中性

D制备AlCl₃．FeCl₃．CuCl₂均不能采用将溶液直接蒸干的方法