下列叙述正确的是（ ）
A．盐酸中滴加氨水至中性，溶液中溶质为氯化铵
B．饱和石灰水中加入少量CaO，恢复至室温后溶液的pH值不变
C．沸水中滴加适量饱和FeC13溶液，形成带电的胶体，导电能力增强
D．相同温度下，将足量氯化银固体分别放入相同体积的①蒸馏水、②0.1mol/L盐酸、③0.1 mol/L氯化镁溶液、④0.1mol/L硝酸银溶液中，Ag+浓度：①＞④＞②＞③
答案：B
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2. One ______ not ______ cross the street against the traffic rules. 3. The workers are doing all they can to ______ the accident rate. 4. She ______ because she was on a diet. 5. He is heavily ______. 6. I'll see the film ______. 7. The teacher ______ by teaching. 8. Tom was very angry and ______ me. 9. She ______ a lot of ______ last winter. 10. Don't ______ when you are late for school. |