皮皮学，免费搜题
登录
搜题
【单选题】
曝气池出口处的溶解氧以( )为宜。A.
1mg/L；
B.
2mg/L；
C.
4mg/L；
D.
6mg/L。
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】什么是桥梁净跨径?
【简答题】P: Excuse me. Can I ask something about high-speed train? C: . P: How often does high-speed train go to Nanjing? C: . P: How long does it take? C: ...
【单选题】He was very of his shortcomings.
A.
concerned
B.
conscious
C.
conscientious
D.
Conscience
【简答题】自动选型有一个好处,当更改继电器( ) 时,通过自动选型选择( )的继电器后,原理图中继电器的所有连接点会( )。
【单选题】听力原文：M:Be quiet, please. Can I remind you what you should do? W: Certainly. Go ahead, please. M:Don't touch the electricity and put everything in order. OK? W:Sure! Can you guess what the man is?
A.
Maybe a teacher.
B.
Maybe a student.
C.
Maybe a meeting organizer.
相关题目：