进入疟区时，作为病因性预防的常规用药是（）。
A.伯氨喹
B.氯喹
C.乙胺嘧啶
D.磺胺
E.奎宁
参考答案：C
A．(A) Because they had driven for a long time.
B．(B) Because they had booked for another time.
C．(C) Because they had planned to have their supper first.
D．(D) Because they had found a better place to stay in.
从设计室外地坪到檐口有几个高度时，以哪一个为檐口高度？
