问题
选择题
---So you think we should sell the house and move to the country.
---_______. We badly need the fresh air there.
A.Exactly.
B.Far from it.
C.Not a little.
D.No wonder.
答案
答案:A
---So you think we should sell the house and move to the country.
---_______. We badly need the fresh air there.
A.Exactly.
B.Far from it.
C.Not a little.
D.No wonder.
答案:A
根据下表回答问题:
实验内容 | 铁丝在O2中燃烧 | 实验室制CO2 | 读出量筒内液体的体积数 | 加热液体药品 | 向上排空气法 收集气体 | |
实验 操作图 |
|
|
| | ||
实验操作图编号 | A | B | C | D | E | F |
(1)______图中的操作,引起体积读数偏大;
(2)______图中的操作,不利于排出瓶内空气;
(3)______图中的操作,会造成制取的气体逃逸;
(4)______图中的操作,会造成相应的仪器炸裂;
(5)______图中的操作,会造成液体沸腾后冲出.