产生房水的部位是（）
A.虹膜
B.脉络膜
C.睫状体
D.晶状体
E.玻璃体
参考答案：C
-That actor often joins in different activities in Beijing. Do you know __________?
-For 5 years.[ ]
A. how soon he will come back
B. how long he has stayed there
C. when he went there
D. how long has he been there
下列沥青混合料拌和设备中拌和效率较高的是（）
A.传统间歇式
B.传统连续式
C.滚筒式
D.具有除尘装置的拌和站
