皮皮学，免费搜题
登录
搜题
【单选题】
Q: What is the interval to treat the boiler water?A.
At 7-day 's interval.
B.
At 8-day's interval.
C.
At regular intervals.
D.
Irregularly.
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】why do we need to write an abstract for our research paper?
【多选题】We write an abstract when ___________.
A.
submitting articles to academic journals
B.
completing and submitting a Ph.D. dissertation or M. thesis
C.
submitting conference papers
D.
selecting which paper to read
【单选题】四显示自动闭塞区段出站信号机显示( )的时候表示准许列车由车站出发，开往半自动闭塞或自动站间闭塞区间？
A.
一个绿色灯光
B.
两个绿色灯光
C.
一个黄色灯光
D.
一个绿色灯光和一个黄色灯光
【多选题】We write an abstract when ___________.
A.
submitting articles to academic journals
B.
completing and submitting a Ph.D. dissertation or M.A. thesis
C.
submitting conference papers
D.
selecting which paper to read
【单选题】When do we need to write an abstract?
A.
When you write a dissertation for a higher degree.
B.
When you submit a research paper for publication.
C.
When your report will be disseminated to an audience.
D.
All of the above.
相关题目：