可用于绿脓杆菌感染的抗生素是
A．青霉素G
B．氨苄西林
C．羧苄西林
D．苯唑西林
E．阿莫西林
参考答案：C
已知奇函数f（x）在定义域[-3，3]上是减函数，且满足f（a2-2a）+f（2-a）＜0，求实数a的取值范围．
—I will have an English test today.
—______.[ ]
A. How do you do?
B. I can help you.
C. Good luck to you!
D. May you happy!
