[音频]
A. To have a place for soldiers to live.
B. To be able to trade with people on the other side of the wall.
C. Because soldiers needed help during attacks.
D. Because it was very safe to live close to the wall.
躯体运动中枢位于
A. 中央前回和中央旁小叶的前部
B. 中央后回和中央旁小叶的后部
C. 颞上回
D. 颞横回
视野最小的是
A. 红色
B. 白色
C. 绿色
D. 蓝色
视远物时,平行光线聚集于视网膜之前的眼称为
A. 远视眼
B. 近视眼
C. 散光眼
D. 正视眼
微信支付 
支付宝支付