我会照样子把句子补充完整。 例：屋里冷冷清清的，连滴滴答答的钟声都听得见。 1．天

下列哪种传染病易引起急性胰腺炎

A．传染性单核细胞增多病

B．病毒性肝炎

C．麻疹

D．腮腺炎

E．风疹

计算机网络最突出的优点是（）

A、精度高

B、运算速度块

C、通信距离远

D、内存容量大

E、共享资源

严重的骨盆骨折失血量最多可达（）

A.500ml左右

B.1000ml左右

C.2000ml左右

D.3000ml左右

E.4000ml以上

When a disease of epidemic proportions threatens the public, scientists immediately get to work, trying to locate the source of affliction and find ways to combat. Vaccination is one of the effective ways to protect the (1) population of a region or country which may be (2) grave risk. The process of vaccination allows the patient’s body to (3) immunity to the virus or disease so that, if it is encountered, one can fight it (4) naturally. To accomplish this, a small weak or dead (5) of the disease is actually injected into the patient in a controlled environment, (6) his body’s immune system can learn to fight the invader (7) . Information (8) how to penetrate the disease’s defenses is (9) to all elements of the patient’s immune system in a process that occurs naturally, in which genetic information is passed from cell to cell. This makes sure that (10) the patient later come into contact with the real problem, his body is well equipped and trained to (11) with it, having already done so before.

There are, however, dangers (12) in the process. (13) , even the weakened version of the disease contained in the vaccine proves (14) much for the body to handle, resulting in the immune system (15) , and, therefore, the patient’s death. Such is the case of the smallpox vaccine, (16) to eradicate the smallpox epidemic that nearly (17) the whole Native American population and killed massive numbers of settlers. (18) 1 in 10,000 people who receive the vaccine (19) the smallpox disease from the vaccine itself and dies from it. Consequently, the process, which is truly a (20) , may indeed hide some hidden curses.

18（）

A.Fortunately

B.Approximately

C.Naturally

D.Specifically

关于肝硬化，下列观点哪项不对（）

A.肝硬化结节不会癌变

B.肝硬化患者，肝转移癌发生率降低

C.血吸虫性肝硬化，肝裂多增宽

D.结节性肝硬化有家族倾向

E.肝脏体积可不同程度增大或缩小