问题
选择题
—What does he ______?
—He is short. He has a big mouth and short legs. [ ]
A. looks like
B. look
C. looks
D. look like
答案
答案：D
搜题请搜索小程序“爱下问搜题”
—What does he ______?
—He is short. He has a big mouth and short legs. [ ]
A. looks like
B. look
C. looks
D. look like
答案：D
除去下列物质中的杂质（括号内为杂质），完全正确的是
| 物质 | 选用试剂 | 操作方法 | |
| A | Cu（CuO） | O2 | 通入氧气并加热 |
| B | CaO（CaCO3） | —— | 高温煅烧 |
| C | H2（H2O） | 稀硫酸 | 洗气 |
| D | KCl（K2CO3） | 盐酸 | 加入足量盐酸充分反应后，蒸发结晶 |