不同运输方式有着不同的技术经济特点，公路运输的弱点表现为()。A.组织过程复杂 B.

阅读理解。

     Most people have ambitions(雄心).An ambition is something we want to do,want to be or want to

have.A student's ambition. for example,might be to pass his or her exams and then get 8 good job. An

athlete's ambition could be to win an important competition. A businessman's ambition is usually to make

a lot of money(赚很多钱)

     Not all ambitions are about success at work.HoweVer,some people just want to be g00d people,

have a famiIy or help others．

     Ben's ambition is to be a sports writer.He wIites the sports repons for his class newspaper. He likes

most spons,and swimIIling and football are his faVorites.Trudy's ambition is to be a concen pianist.She is

very seirous about it and practises eVery day with her best friend"ly.It is very imnportant to her.

     Harry's ambition changes every day!One day heⅧlts to be an astronaut．The next day he wants to

be a pop smger．The next day he wans to drive a racing car(赛车)．His mother would be happy if his

ambition was to get up in time for school every day!

1. What do most businessmen want?

A. To make a lot of money.    

B. To trave everywhere.

C. T.o get a lot of things.      

D. Tb buy a lot of things.

2.What does Ben want to be?

A. A businessman.    

B. A sports writer．

C. A pilot.          

D. A computer programmer.

3. Why does Tmdy practice  the piano every day? 

A. Because she wants to be a concert pianist.

B. Because she wants to be an astronaut(宇航员)．

C. Because she wants to be a pop singer.

D. Because she wants to be a spons writer.

4. Who's Trudy's best friend?

A. Ben.    

B. Hany.    

C. Lily.    

D. Lucy.

5. What does Harrr's mother want him to do?        

A. To work hard．    

B. To do his homework．

C. To exercise more eVery day．    

D. To get up in time for school every day．

Almost seven tons of amber__________ the Amber Room.

A．was used to make

B．was used to making

C．were used to make

D．were used to making

铝的以下反应得以进行的原因，可用勒沙特勒原理解释的是

A．与盐酸反应产生氢气

B．在氯气中燃烧

C．放入硝酸汞溶液中表面形成铝汞齐

D．一定温度下，用铝与氧化钙反应制得金属钙

轴流式风机在流量大时，运行经济性高于离心式风机。

骨关节结核窦道形成继发化脓感染时与慢性化脓性脊椎炎在x片上鉴别诊断的要点是

A．一般只影响单个椎体，椎间隙正常
B．椎体骨质密度增高，硬化，椎间隙变窄
C．椎体骨质疏松，脊柱呈竹节样融合
D．椎体边缘破坏，椎间隙变窄，椎旁软组织阴影增宽
E．一般影响多个椎体，椎体变形，椎间隙正常