跳跃反应的中枢位于
A．脊髓B．延髓C．脑桥D．大脑皮层
参考答案：D
用所给词的适当形式填空。
1. What time______school ______ (start)?
2. My father______ (take)a shower at 10:00.
3. Mr Smith usually______ (work) at night.
4. What time______your sister______ (have)a shower?
5. Do you want ______ (know) about your family?
甲的生长区位于（）
A.甲半月
B.甲板
C.甲床
D.甲母质
E.甲根
