眼的折光系统不包括（）
A.角膜
B.房水
C.晶状体
D.玻璃体
E.视网膜
参考答案：E
解析：角膜、房水、晶状体和玻璃体构成眼折光系统。
---If you are free, go skating with us, OK?
---______________.
A．Not at all.
B．Sure, I’d love to.
C．No, I don’t like you.
D．That’s right.
__ people are going abroad.[ ]
A. A number of
B. The number of
C. Numbers of
D. A number
