唐太宗时期重用多谋善断的大臣为宰相，他们是[ ]
A、房玄龄、杜如晦
B、房玄龄、姚崇
C、杜如晦、宋璟
D、姚崇、宋璟
答案：A
I often think of the years ____ I worked with the foreigners, ____ has had a great effect on my later life.
A．that; which
B．when; which
C．which; that
D．when; who
消毒使用的C波紫外线，其波长范围为（）
A.200～275nm
B.100～180nm
C.220~300nm
D.250～320nm
E.190～260nm
