题目

下列试剂保存方法或实验方法中，不正确的是（） A . 用托盘天平称取5.2gNaOH固体时，不能把NaOH放在纸片上称 B . 用10mL的量筒量取9.0mL无水乙醇，使液面最低点至刻度9.0mL处 C . 浓硫酸保存在广口瓶中，没有挥发性，无须密封 D . 溴水密封保存，放置于阴凉处 答案：C按要求改写下面句子。1. I used to read newspaper after supper. (改为一般疑问句)     ____ you ____ to read newspaper after supper? 2. The baby weighs 12 pounds. (就划线部分提问)    ____ ____ does the baby weigh? 3. She is such a beautiful girl. (改为同义句)    ____ ____ the girl is! 4. The island is so interesting that everybody likes to go.    The island is ____ ____ for everyone to go. (改为同义句)5. The boy is thinking about what he is going to do next week. (改为同义句)     The boy is thinking about ____ ____ do next week.