下面哪一项不属于DBS3900基站的监控系统()。
A、EMUA
B、PMU(APM30)
C、IBBS
D、DCDU-03
参考答案:C
地表及岩层移动观测站设计书由()和()两部分组成。
Mary is a good girl, but she has some___________. For example, she doesn’t like helping others.
A.questions
B.mistakes
C.shortcomings
D.disadvantages