打字时，操作人员两肘应贴于（），身体可略前倾斜。
A、腋边
B、键盘
C、大腿
D、腰间
参考答案：D
用所给单词的适当形式填空。
1. The child ______ ______ (not like) the new doll.
2. ______ (we) school is very beautiful.
3. Why do you buy so many books? I don't like ______(they).
4. He likes swimming, and he is a good ______ (swim).
5. What do you ______ (usual) do on your birthday?
食物链
