关于正常产褥，下列哪项正确A．子产后1周腹部检查扪不到子宫底 B．宫颈外形约于产后3

某六层砖混结构住宅楼，每层结构外围水平面积800m2，每层封闭阳台的水平投影面积20m2，底层阳台为落地阳台，雨篷共计3个，雨篷共计长2．84m，挑出宽度为1．5m,屋面有维护结构水箱间面积25m2。该工程的建筑面积为（）m2，该工程平整场地工程量清单项目工程量为（）m2。

A．4866．39,832．78

B．4885．00,820．00

C．4932．78,812．78

D．4945．00,800

如图所示，足够长传送带与水平方向的倾角为θ，物块a通过平行于传送带的轻绳跨过光滑轻滑轮与物块b相连，b的质量为m，开始时a、b及传送带均静止，且a不受传送带摩擦力作用，现让传送带逆时针匀速转动，则在b上升h高度（未与滑轮相碰）过程中

A．物块a重力势能减少mgh

B．摩擦力对a做的功大于a机械能的增加

C．摩擦力对a做的功小于物块a、b动能增加之和

D．任意时刻.重力对a、b做功的瞬时功率大小相等

We should let more young parents and their children can enjoy scientific early education.

A．provide more young parents and their children to enjoy early education

B．provide more young parents and their children to enjoy early education and scientific

C．provide young parents and their children enjoy more scientific early education

D．provide young parents and their children with more early education services

阈值是指感觉器官能够感受到的（）浓度。

多尿是指24小时尿量大于（）

A.100mL

B.200mL

C.400mL

D.2000mL

E.2500mL