Th细胞特有的分子是（）。 A.CD2 B.CD19 C.CD4 D.CD8 E.C

胆道蛔虫症（）

A.上腹剧烈刀割样疼痛

B.中上腹持续性剧痛

C.右上腹阵发性绞痛

D.阵发性剑突下钻顶样疼痛

E.持续广泛性剧烈腹痛，板状腹

II. 完形填空（共15题，每小题2分，共30分）

American public education has changed in recent years. One change is that increasing numbers of American parents and teachers are starting independent public school   11   charter schools (特许学校).

In 1991, there were no charter schools in the United States. Today, more than2,300 charter schools    12    in 34 states and the District of Columbia. 575,000 students   13   these schools. The students are from 5 years of age through 18 or older.

A charter school is   14   by groups of parents, teachers and community (社区) members, It is similar in some ways    15   a traditional public school. It receives tax money to operate just as other public schools do. The    16   it receives depends on the number of students. The charter school must prove to local or state governments that its students are learning. These governments   17    the school with the agreement, or charter that permits it to operate.

Unlike a traditional public school,    18    the charter school does not have to obey most laws which govern public schools. Local, state or federal governments cannot tell it what to  19  .

Each school can choose its own goals and decide the ways it wants to  20  those goals. Class sizes usually are smaller than those in many traditional public schools. Many students and parents say   21   in charter schools may be more creative.

However, state education agencies, local education-governing committees and unions are often    22    charter schools. They say these schools may receive money badly   23   by traditional public schools. Experts say some charter schools are doing well while others are struggling.

Congress provided 200million dollars for  24   charter schools in the 2002 federal budget (预算). But often the schools say they lack enough money for their    25   .Many also lack needed space.

11. A. called       B. asked        C. known        D. said

12. A. study       B. organize      C. operate        D. perform

13. A. finish       B. attend        C. leave         D. cut

14. A. taught       B. held         C. created        D. understood

15. A. to          B. with          C. by           D. in

16. A. attention     B. amount      C. expense       D. information

17. A. buy         B. review       C. give          D. provide

18. A. besides      B. moreover     C. thus          D. however

19. A. teach        B. discuss       C. have         D. get

20. A. set          B. reach        C. settle         D. define

21. A. farmers      B. workers      C. teachers       D. soldier

22. A. against       B. for          C. in            D. with

23. A. treated       B. needed       C. earned        D. wasted

24. A. needing      B. spending     C. comparing     D. establishing

25. A. programs     B. parents       C. records       D. words

周围血管征的发生机理是（）

A.舒张压过高

B.收缩压过高

C.脉压过大

D.脉压过小

E.心律失常

中药鉴定称取样品2.00g是指（）

A.1.5～2.5g

B.1.995～2.005g

C.1.95～2.05g

D.1.9～2.1g

E.1.99～2.01g

Networks can be interconnected by different devices. In the physical layer, networks can be connected by (11) or hubs, which just move the bits from one network to an identical network. One layer up we find bridges and switches, which operate at data link layer. They can accept (12) ,examine the MAC address, and forward the frames to a different network while doing minor protocol translation in the process. In the network layer, we have routers that can connect two networks. If two networks have (13) network layer, the router may be able to translate between the packer formats. In the transport layer we find transport gateway, which can interface between two transport connections. Finally, in the application layer, application gateways translate message (14) . As an example, gateways between Internet e-mail and X.400 e-mail must (15) the e-mail message and change various header fields.

12（）

A.frames

B.packets

C.packages

D.cells