以下是生物杀虫剂的是（）。
A.敌百虫
B.马拉硫磷
C.杀灭菊酯
D.绿僵菌
参考答案：D
The boy the first prize, but he was so careless as to make a foolish mistake.
A．must have gained
B．need have gained
C．could have gained
D．shall have gained
人格包括人的( )。
A．气质
B．性格
C．情绪
D．环境
