He had little idea that it was getting s

We didn't know you were in trouble at that time, otherwise we________ you a hand. [ ]

A. had given      

B. gave

C. would give  

D. would have given

This kind of VCD is made ____ China. [ ]

A. in

B. from

C. at

D. on

肠管脱出未见血流障碍的是（）。

A.易复性斜疝

B.难复性斜疝

C.嵌顿性斜疝

D.绞窄性斜疝

E.腹股沟直疝

下列测量方法中，可用于建立国家一、二等高程控制网的方法包括（）。

A、三角高程测量

B、水准测量

C、GPS水准测量

D、地形控制测量

E、重力测量

ZXMPS320组成的网络中，某个网元上报B1性能值，与该点通过光纤直接相连的下游网元一定会报告B1性能值吗？为什么？