警官共同训练包括哪些内容（）.
A.法律法规
B.公文写作，
C.业务训练
D.体能训练
参考答案：A, B, D
太阳光与水平面成30°角斜射到水面，则反射角为______；若太阳光垂直射向水面，则反射角是______．
Though I didn't often but I have never . [ ]
A. get ahead, drop out
B. get up, give up
C. get to, drop out
