盘桓 pán huán

氯乙烯的清釜工人可患（）

A.聚合物烟雾热

B.视网膜动脉瘤

C.肢端溶骨症

D.下颌骨坏死

E.氟骨症

小丽同学家里的养鱼缸如果长期不换水，在缸的内壁水面上就会生有一层绿色的水膜，这是因为滋生了（　　）

A．藻类植物

B．苔藓植物

C．蕨类植物

D．种子植物

二叉树是结点的有限集合，它有( )根结点。

A．有0个或1个

B．有0个或多个

C．有且只有1个

D．有1个或1个以上

词汇运用(10分)

小题1:Nelson Mandela devoted most of his life to ___________(fight) for democracy(民主)and won the Nobel Peace Prize in 1993.

小题2: When she heard something ___________(surprise), she couldn’t stop shouting out.

小题3: Casey Modoo isn’t confident of himself because of his __________(ugly), but everyone loves him.

小题4: A number of forests ____________(destroy) in many parts of the world in the past few years.

小题5: The survey shows that nine ____________(twenty) of US people like shopping online during the daytime.

小题6:The flowers are for the __________(direct). I’m interested in their films.

小题7: This is ____________(enjoyable) trip that I have ever taken. I feel unhappy about it.

小题8: The Youth Olympic Games will be on August 16 in Nanjing. We hope it will be held ______(success).

小题9:Huang Xiaoming showed us his great __________(improve) in his English in “American Dreams in China”.

小题10: －Who did your father have ____________(repair) the broken car?

－Our neighbour.

抗结核作用强，且对金黄色葡萄球菌有效的药物是（）

A.利福平

B.对氨基水杨酸

C.吡嗪酰胺

D.链霉素

E.乙胺丁醇