骶3～5节段感觉神经（）。
A.大腿前部
B.小腿外侧和足背
C.肛门周围
D.前臂尺侧
E.胸骨柄
参考答案：C
某同学用托盘天平称取2.5克食盐时，发现指针向左偏转，此时他应该（ ）
A．增加砝码
B．减少砝码
C．增加食盐
D．减少食盐
用所给词的正确形式填空。
1. I go home _____(one) a week.
2. There are the _____(key) to these doors.
3. I would like to make friends with an _____(interview).
4. I _____(do) some reading tomorrow.
5. Tom usually _____(get) up at 8:00 on Sunday.
6. Where _____(do) Maria go on vacation?
