为了预防麻疹发生，进行人工自动免疫最佳时期在（）。A.接触麻疹病人后5天 B.生后8

阅读理解。

     Every country has its favorite food. Italians like to eat pizza. Indians like

to eat hot food. Japanese like to eat fish. Often they don't cook it.

     In England,  one of   the most popular kinds of   food is  fish   and chip.

People usually buy it in a fish and chip shop. They put it in paper bags, and

take it home, or to their workplace. Sometimes they eat it in the park or on

the road.The world's favorite food is American fast food.If you go to some

important cities in the world,  you can find  people  eating hamburgers and

chips.

     Fish and chips,and Chinese take-away food are very popular in England.

But  they  are less popular in the USA;  they eat take-away food,  too,  like

chicken. But the most popular kind of take-away food is the hamburger. It

looks like bread with meat in it . Ham (火 腿) is a kind of   pork,   but the

hamburger does not have any pork in it. The beef   is inside a kind of   cake

hamburgers are delicious. They are also popular in England and Australia.

1. Italians like to eat __________.

A. dumplings      

B. pizza      

C. hot food      

D. fish

2. Fish and chips are very popular in ________.

A. England        

B. Australia  

C. the USA      

D. Canada

3. In different countries people eat ______ food.

A. different        

B. the same  

C. the different    

D. same

4. The hamburger does not have any _______ in it.

A. beef            

B. pork      

C. fish          

D. chips

5. Hamburger is a kind of ______.        

A. meat            

B. drink    

C. food          

D. vegetable

当管电压在250kV，管电流15mA的治疗机，其墙壁距X线管应（）

A.在2m以外应置不低于8mm铅

B.在2m以外应置不低于10mm铅

C.在2m以外应置不低于6mm铅

D.在2m以外应置不低于4mm铅

E.在2m以外应置不低于2mm铅

水是生命的基础，没有水就没有生命。下列有关水的说法中，错误的是 [ ]

A. 水能溶解很多物质

B. 无色、无味、清澈透明的水就是纯水

C. 锅炉中长期使用硬水容易产生水垢，严重时会引起爆炸

D. 婴幼儿、青少年长期饮用矿泉水无益健康

针对同一风险的控制措施多种多样，在选取控制措施时，需要考虑现场的实际情况，优先选择（）。

A.管理控制措施

B.工程控制措施

C.个人防护措施

经销商代送修机器中，录入最终用户信息的比例应达到（）以上？

A.40%

B.50%

C.60%

D.70%