对红内期疟原虫有杀灭作用的有（）
A.氯喹
B.伯氨喹
C.甲氟喹
D.青蒿素
E.乙胺嘧啶
参考答案：A, B, C, D
The enemy troop suddenly took the small village by surprise _____ a rainy morning.
A．on
B．at
C．in
D．during
中生代从早到晚有__________、________、________，它们的代号分别为_________、________、________。
