下列哪项指标是用于测定发病率不准确且病死率极低的传染病的流行强度（）

A.病死率

B.现患率

C.超额死亡率

D.累积死亡率

E.罹患率

A.选用方框内所给词的适当形式填空，词限用一次。

小题1:He has been         (collect) coins for 2 years

小题2:The population of China is the        (large) in the world

小题3:My grandma got a special gift on her        (ninety) birthday yesterday

小题4:These days many         (foreign) from all over the world go to visit San ya

小题5:Dropping litter is almost never         (allow)

B、根据句意及词首字母或汉语提示，补全单词。

小题6:May I have a s        ? I want to post a letter

小题7:We are not         (应该) to play football in the street

小题8:Milk is wearing a new pair of         (牛仔裤)

小题9:Talk loudly in a library，a museum，or a movie theater is

i       

小题10:The children are old enough to look after t      .