坚持运动和物质的辩证关系原理的意义在于（）。A、坚持了彻底唯物论的一元论B、反对了旧

阅读理解.

    What is color? Why do some of the things around us look red, some green, others blue?

    Colors are really made by reflected (反射) light. We see color because most of the things reflect light.

In the same way, if something is green, it reflects most of the green light.  If something reflects all light, it

is white. If it doesn't reflect any light, it is black.

    Some of the light is reflected and some is taken  in (吸引) and turned  into (变成) heat (热能).  The

darker the color is,  the  less light is reflected . the more light is taken in , the dark-colored  clothes  are

warmer in the sun than light-colored clothes.

1. When something reflects light, we can         .        

A.  see its color          

B.  see its heat            

C.  not see its color

2. Something looks white because it reflects          .      

A.  some light          

B.  no light                

C.  all light

3. The dark-colored clothes are warm because         is taken in. 

A.  more light          

B.  less light                

C.  more color

4. In summer         make people feel cool.    

A. dark-colored clothes

B. red-colored clothes

C. light-colored clothes

5. What's the best title of this passage?

A.  Dark color.          

B.  Color.                

C.   Heat.

病例对照研究样本大小估计的四个必须的条件是什么？

由于______的吸引而使物体受到的力叫做重力，重力常用字母______来表示，重力的施力物体为______；物体受到的重力跟它的______成正比，重力的方向：______；重力的作用点叫______．

3个月女孩，生后有窒息，吃奶少，睡眠时间少，安静，少哭，少动，大便3～4天一次，干燥，皮肤温度低，心率100次/分，心音低钝，腹膨隆，有脐疝。

本病临床特点，哪项不正确（）

A.智力低下

B.身材矮小，四肢短粗，躯干相对较长

C.生理功能低下

D.性腺及第二性征发育落后

E.骨龄正常

F.特殊面容

物业管理的( )，指的是摆脱了过去那种自建自管的分散管理体制，由多个产权单位、产权人通过业主大会选聘一家物业服务企业。

A．社会化
B．专业化
C．市场化
D．国际化