下列地点可能找到水源的有（）。①石灰岩洞穴内；②峡谷中多石砂处；③地势较高处
A.①②
B.②③
C.①②③
参考答案：A
He was ________ when the customs officers found drugs in his bag.[ ]
A. argued
B. fought
C. persuaded
D. arrested
医师开具处方和药师调剂处方应当遵循的原则是
A．安全
B．有效
C．适当
D．方便
E．经济
