用含某种激素的饲料喂养蝌蚪，能缩短发育时间，饲料中所含的激素是[ ] A．性激素

阅读理解。

     Amanda has a big room. A desk is on the floor. A comfortable chair is near the desk Many books and a

computer are on the desk. Next to the desk is a dresser. An alarm clock is on the dresser. The alarm clock

wakes her up every day. The wall is pink. That's her favorite color. On the wall, we can see her family photo.

Look, she also has a pink bed. Now her cat is sleeping on the bed. Do you like her room?

1. Where's the chair?

    _______________________________________________________________________

2. Where's the alarm clock?

    _______________________________________________________________________

3. Where's her family photo?

    _______________________________________________________________________

4. Where's her cat?

    _______________________________________________________________________

5. What color is the Wall?

    _______________________________________________________________________

圆的半径是10，弦心距为8的弦长是______．

一个行业的进入壁垒越高，则该行业的自我保护越（），该行业的内部竞争越（）。

A．强，强

B．强，弱

C．弱，强

D．弱，弱

对于保险人来说，续保的优越性不仅可以稳定公司的业务量，而且更主要的是（）。

A.收取续保手续费

B.续保手续费高于新业务的手续费

C.减少展业工作量与费用

D.提高公司知名度

世界是纷繁复杂的,存在着是是非非,这就要求我们时刻保持清醒的头脑,分清是非.是非不分的危害有　

① 影响人与人之间的和谐相处　②破坏社会风气　　③危害社会安全　④扰乱社会秩序

A．①②③④

B．①②③

C．①②④

D．①③④