问题
选择题
人类的生产和生活都离不开氧气。有关氧气的正确认识是[ ]
A．木炭在空气中燃烧比氧气中更旺
B．氧气易溶于水，不能用排水法收集
C．工业上可用通过分离液态空气制取氧气
D．实验室中可用加热分解水来制氧气
答案
答案：C
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人类的生产和生活都离不开氧气。有关氧气的正确认识是[ ]
A．木炭在空气中燃烧比氧气中更旺
B．氧气易溶于水，不能用排水法收集
C．工业上可用通过分离液态空气制取氧气
D．实验室中可用加热分解水来制氧气
答案：C
| 根据短文内容将各人的名字写在下列表格内。 | ||||||||||||
| The children are going to play a game. They are standing in two rows (排). The girls stand in the front row. The boys stand in the second row. Mary stands in the middle. Betty stands on her right side. Han Meimei stands on Mary's left side. Lucy stands on the right of Betty. Lily does not stand next to Betty. She stands next to Han Meimei. Sam stands behind Lily. In front of Alex is Han Meimei. Bill doesn't stand in the middle of the second row. On his right stands Tom, and Tim stands on his left. | ||||||||||||
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