大型飞机上，着陆灯灯泡功率较大，为了延长寿命，减少能量损耗，一般使用时问是（）.
A.不超过5分钟
B.不超过lO分钟
C.不超过15分钟
参考答案：A
环氧乙烷精制塔塔顶温度通常控制在（）℃。
A、40～45
B、48～55
C、55～60
D、50～55
Woman: My headache is killing me. I thought it was going away, but now it is getting worse and worse.Man: I told you yesterday to make an appointment.Question: What does the man mean
A．The woman has been complaining too much.
B．The woman's headache will go away by itself.
C．The woman should have seen the doctor earlier.
D．The woman should confirm her appointment with the doctor.
