敷设路由必须按路由复测划线进行,若遇特殊情况必须改动时,一般以()为原则。
A.不增长敷设长度
B.施工方便
参考答案:A
改善粗粒浮选效果,可以采取哪些措施?
The teacher stressed again that the students should not any important details while retelling the story. [ ]
A. bring out
B. let out
C. leave out
D. make out