沥青混合料中，掺加矿粉的目的是为了( )。A．提高密实度 B．提高稳定度 C．增加

完形填空。

Many adults see teens as energetic. Many of us see ourselves as proud. This thinking   1   many adults and us to have the idea that if we can't handle school or   2   life well, we are just not trying hard.      But in my opinion that may not be   3  .      Earlier this school year, I was leaving my class one Friday   4   suddenly it   5   like I had pulled a muscle in my back. I knew I was ill.      After a few days I stopped eating. This meant I lost   6  ; the clothes that I bought two weeks earlier began   7   loose. This time my parents got scared.        8  , I started sleeping less. My eyelids (眼皮) were constantly   9  .      I refused to 45 that I was ill. I kept my job working  10  hours a week in a shop; I didn't  11  any classes. When I was hurting, I didn't mind and kept on going.  12  it kills you, it makes you stronger, right?      But now I find myself thinking. Is it  13  it? I'm taking the classes and working for the newspaper because it does good  14  college applications. And I'm working 25 hours a week so that, once I get into my dream school, I can  15  it.      Here I am, already sick from the  16  of work I'm doing in and out of school. So, what good is a(n)  17   application if I'm badly ill? What is the  18  of doing this work if I can't enjoy the results?      In fact, by writing my  19  I'm telling all the people who  20  much about the future to worry about it now.

( )1. A. makes     ( )2. A. still     ( )3. A. true      ( )4. A. while     ( )5. A. looked    ( )6. A. face      ( )7. A. hanging   ( )8. A. In fact   ( )9. A. light     ( )10. A. insist   ( )11. A. lose     ( )12. A. Unless   ( )13. A. paid     ( )14. A. at       ( )15. A. control  ( )16. A. amount   ( )17. A. suitable ( )18. A. reason   ( )19. A. time     ( )20. A. think    B. forces       B. even         B. real         B. when         B. sounded       B. hope         B. holding       B. In addition   B. shut         B. determine     B. drop         B. If           B. similar to   B. to           B. manage       B. set           B. impressive  B. idea         B. work         B. care       C. causes       C. just         C. wrong       C. then         C. appeared     C. weight       C. changing     C. In disorder  C. open         C. accept       C. give         C. Though       C. equal to     C. on           C. support      C. kind         C. believable   C. point       C. newspaper   C. miss        D. intends      D. yet          D. false        D. how          D. felt         D. direction                D. dressing     D. In general   D. heavy        D. consider     D. take         D. Before       D. worth        D. with         D. afford       D. number       D. usual        D. tip          D. story        D. realize

请写出下列化学反应的文字表达式，指出化学反应的类型，并注明各物质的化学式．

化学反应	（1）文字表达式	（2）化学反应类型
细铁丝在氧气中燃烧
电解水
用氯酸钾制氧气

细铁丝在氧气中燃烧文字表达式______化学反应的类型______

电解水文字表达式______化学反应的类型______

用氯酸钾制氧气文字表达式______化学反应的类型______．

按照地理方位，亚洲共分为几个地区（　　）

A．3个

B．4个

C．5个

D．6个

国际上对广泛用于临床的喹诺酮类药物都限制在儿童和青少年中应用，主要原因为( )。

A．该类药在儿童体内生物利用度低，疗效差
B．该类药在儿童体内有可能产生有毒代谢物
C．该类药副作用较多，使用安全性差
D．该类药对幼龄动物的关节软骨有影响
E．该类药可致新生儿听力受损

压裂管柱主要由（）等组成。

A.压裂管柱

B.封隔器

C.喷砂器

D.以上都有