质控方法对无误差分析批作出了在控判断，称为_______。

下列各项中，（）是保险市场的供给方。

A.保险代理人

B.保险经纪人

C.保险公司

D.保险公估人

通过移项将方程变形，下列各项错误的是（　　）

A．由x+2=2x-7，得x-2x=-2-7

B．由x+3=2-4x，得x+4x=2-3

C．由2x-3=-x-4，得2x-x=3-4

D．由1-2x=3，得2x=1-3

孕妇饮食中缺碘，致使胎儿在胚胎期甲状腺低下是散发性先天性甲状腺功能低下的主要原因。()

Scientists would like to place a huge mirror in space above the earth. It might be sixty miles wide. It would be used to catch the rays (光线) of the sun. It would direct the sun’s rays upon the earth as a child might do to make sunlight dance on the wall with a hand mirror.

Why do they want to do this? The sun’s rays could be helpful in many ways. They could light up cities by night. The warm rays could stop frosts (霜冻) which might come at night and hurt fruit crops. They could melt (融化) dangerous icebergs in the ocean. Perhaps they could change cloud movements and bring rain where it is needed.

小题1:The huge mirror would ______.

A．stand 60 miles in height (高度)

B．be 60 miles from side to side

C．cover 60 miles of the earth

D．be 60 miles above the earth小题2:The mirror would be used to ______.

A．reflect (反射) sunlight

B．absorb (吸收) sunlight

C．see what the earth looks like

D．see how clouds move小题3:The strong light from the mirror could possibly ______.

A．hurt fruit crops

B．set fire to cities

C．bring longer daytime

D．shine through walls小题4:The huge mirror is ______.

A．something in a story

B．already made

C．just an idea

D．to be made soon

目前在单层厂房中用的较多的是两铰和（）两种形式

A.三铰

B.单铰

C.混合式