肉眼可见的临界值是()
A: PM100
B: PM50
C: PM25
D: PM10
A: PM100
B: PM50
C: PM25
D: PM10
举一反三
- When will the product be ready A: 1 pm B: 3 pm C: 4 pm D: 6 pm
- 关于 PM 2.5 与 PM 10 说法正确的是()
- 查询软件包的命令是( ) A: pm -i filename B: pm -U filename C: pm -e filename D: pm -q filename
- 【单选题】为安装一个软件包,应使用 ( ) A: pm -i B: pm -e C: pm -q D: pm –V
- Conversation two When will Mrs. Griffin arrive at Sunrise Hotel A: at 9:15 pm B: at 9:35 pm C: at 10:00 pm