中兴通讯嵌入式组合电源包括下面哪几个()。
A、ZXDU30
B、ZXDU45
C、ZXDU75
D、ZXDU28
参考答案:A, B, C
I joined a gym with the help of my daughter two years ago and now I exercise every day. [ ]
A.stick to
B.hold up
C.pick up
D.take on
飞机的理论升限()实用升限
A.等于
B.大于
C.小于