阅读短文，根据短文内容判断正误，正确的写"T"，错误的写"F"。

    Last weekend we played games and went swimming, but we didn't watch TV. My mother cooked our

favourite food and we helped her. We often went for a walk along the beach(海滩)．

( ) 1. We watched TV last weekend.

(     ) 2. We didn't go for a walk along the beach.

(     ) 3. Last weekend we went swimming.

(     ) 4. My father cooked our favourite food.

试述眼球玻璃体积血的声像圈。