有人主张为提高水平扫描分解力，电子束直径越小越好。

某公司2006年3月以3500万元购得一写字楼作为办公用房使用，该写字楼原值 6000万元，累计折旧2000万元。如果适用的契税税率为3%，该公司应缴契税为( )万元。

A．120

B．105

C．180

D．15

A、B、C、D、E分别是氯化钾、碳酸氢铵、硝酸铵、硫酸钾、氯化铵五种化学肥料中的一种，现按如下操作进行鉴别实验：

根据上述现象，试推断出上物质（用化学式表示）A______、B______、C______、D______、E______．

阅读理解。

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

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

Something is red, for it reflects most of the red 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 (吸收) and turned into (变成)heat (热能).The darder

the colour is, the less light is reflected, the more light is taken in. So dard-coloured (深色的) clothes are

warmer in the sun than light-coloured clothes.

1. When something reflects light, we can _______. 　　

A. see its colour 　　

B. see its heat. 　　

C. not see its colour 　　

D. see nothing

2. Something looks white because it reflects______. 　　

A. some light 　　

B. no light 　　

C. all light

D. most light

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

A. more light 　　

B. less light 　　

C. more colour 　　

D. less colour

4. In summer _____ make people feel cool. 　　

A. dark-clolured clothes 　　

B. red-coloured clothes 　　

C. green-coloured clothes 　　

D. light-coloured clothes

5. What's the best title (题目) of this passage (短文)? 　

A. Dark colour 　　

B. Colour 　　

C. Heat 　　

D. Clothes

可燃物燃烧后产生不能继续燃烧的新物质的燃烧称为完全燃烧。

流注相当于西医的（）

A.毛囊炎

B.皮肤浅表脓肿

C.急性化脓性淋巴结炎

D.蜂窝组织炎

E.脓血症