房水具有的功能是（）。
A.营养角膜、晶状体、维持眼压
B.维持及分泌房水、调节屈光度
C.调节进入眼内的光线
D.屈光、调节屈光度
E.屈光、支撑视网膜
参考答案：A
解析：这是基础知识题，考查三种主要眼内容物的生理功能。房水的功能为维持眼压，营养角膜、晶状体等；晶状体的主要功能是屈光、调节屈光度、吸收紫外线；玻璃体的主要功能是屈光、支撑视网膜、减震等。
Good morning, everyone! Welcome to Cool Food Store. Christmas Day is next Sunday. Our 1. ______ is on sale for Christmas. 2. ______ and have a look. We have hamburgers 3. ______ only 7 dollars. Do you like snacks（零食）? We 4. ______ all kinds（种类）of snacks. You can also buy vegetables at our store—potatoes, 5. ______... They are all 6. ______. Our drinks（饮料）are all at good 7. ______. Juice is 2 dollars. Coke is 3 dollars. How much is our milk? Oh, it’s only 1 dollar. Do you need fruit? Come to our store. We have many fruits, like（例如）oranges, pears and strawberries. Our store is open（营业的）8. ______ 9:00 am to 9:00 pm every day. 9. ______ want it, we have it. Come to our store to buy some of your favorite food. Then you can have a 10. ______ dinner with your family on Christmas Day.
|