Many people claimed ________ the violent attack.

A．seeing

B．to see

C．have seen

D．to have seen

某孕妇习惯流产2次，查原因为黄体功能不足，目前孕8周，予肌注黄体酮保胎。其剂量为每日（）。

A.10mg

B.15mg

C.20mg

D.25mg

E.30mg