问题 单项选择题

胎盘娩出后,宫底的位置是

A.半横指
B.1横指
C.2横指
D.3横指
E.4横指

答案

参考答案:B

解析: 胎盘娩出后,子宫收缩变得圆而硬,宫底在脐下1横指。

材料分析题

在现实生活中,有许多事(特别是坏事或向坏的方向发展),开始时往往不会引起我们的注意,可一旦发现,却为时已晚了,青少年学生应懂得防微杜渐的道理。

(1)对于防微杜渐这个道理,你是怎样理解的?

                                                                                                                                                             

                                                                                                                                                             

                                                                                                                                                             

(2)请列举目前青少年中较常见的几种不良行为,并谈谈它们的危害。

                                                                                                                                                              

(3)你认为该如何避免和矫正这种行为?

                                                                                                                                                              

                                                                                                                                                              

单项选择题