问题
单项选择题
普通阴极电泳槽液固体份应比较合理的范围（）之间；
A、17-22%
B、15-17%
C、22-25%
D、12-15%
答案
参考答案：A
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普通阴极电泳槽液固体份应比较合理的范围（）之间；
A、17-22%
B、15-17%
C、22-25%
D、12-15%
参考答案：A
| 用方框中所给词的适当形式填空, 其中有两个词是多余的. | |
| |
| l. It's snowing hard outside. It's very __ __ now. 2. —How is it __ __ in your new school? —Not bad. 3. People like to swim in summer because it is too __ __. 4. The weather in Hainan is __ __ all year round, so people can grow rice three times a year there. 5. It gets __ __ when autumn (秋天) comes. |