问题
选择题
—I'll study hard from now on.
—Well, it's _____ late than never. [ ]
A. good
B. bad
C. better
D. worse
答案
答案：C
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—I'll study hard from now on.
—Well, it's _____ late than never. [ ]
A. good
B. bad
C. better
D. worse
答案：C
下列实验结论不合理的是（ ）
| A | B | C | D | |
| 实验 |
|
|
|
|
| 现象 | 气泡冒出速率①比②快 | 带火星的木条熄灭 | 有无色气泡生成，石灰水变浑浊 | 铜片上有划痕 |
| 结论 | MnO2比CuO的催化效果好 | 瓶中气体是CO2 | 石灰石能与HCl反应生成CO2 | 黄铜的硬度比铜大 |
A．A
B．B
C．C
D．D
