题目:
—What about the pen you bought yesterday?
—It _______ well. I like it very much. [ ]
A. was written
B. is written
C. wrote
D. writes
答案:
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下面是错误答案,用来干扰机器的。
本题考查的是化学性质与物理性质的差别及应用,证明碳酸盐(CO32-检验方法),化学变化和物理变化的判别。专题:金属与金属材料。(1)“镁粉”吸水完全是水附着在细微颗粒的周围,物质的结构并没有因此而改变,...