问题
单项选择题
沉降法
A．定方向径
B．筛分径
C．有效径
D．比表面积等价径
E．平均粒径
答案
参考答案：C
搜题请搜索小程序“爱下问搜题”
沉降法
A．定方向径
B．筛分径
C．有效径
D．比表面积等价径
E．平均粒径
参考答案：C
| 从方框中选择适当的句子，将字母代号填入空白处，完成对话。 | |
| |
| Ken: May, do you have any rules in your house? May: Yes, I do. 1 Ken: Really? What are they? May: 2 Ken: Why? Do you have lots of homework? May: Not really. 3 Ken: What do you usually do after that? May: 4 Can you go out in the evening? Ken: Yes, of course. 5 |