问题 单项选择题

可引起出血性结肠炎,并能引起致死性并发症,如溶血性尿毒综合征的大肠埃希菌的血清型是

A.O139

B.O157:H7

C.以上均不是

D.O55

E.O111

答案

参考答案:B

解析:肠出血型大肠埃希菌(enterobe-morrhagic E.coli,EHEC)又称产志贺样毒素(VT)大肠埃希菌(SLTEC或UTEC),其中O157:H7可引起出血性大肠炎和溶血性尿毒综合征(HUS)。

完形填空

短文填词(共10小题;每小题1分,满分10分)

阅读下面短文,根据以下提示:1)汉语提示,2)首字母提示,3)语境提示,在每个空格内填入一个适当的英语单词,并将该词完整地写在右边相对应的横线上。所填单词要求意义准确,拼写正确。

A few years ago when I was 18 years old, my mom

passed away due to _____(癌症). It was the toughest time of                       小题1:__

my l_____. I have wonderful friends and family but the most                小题2:________

touching moment I ____(经历)was from a 10-year-old girl whom          小题3:_________

I didn’t know at all. I was w_____ at a summer camp and it was                  小题4:________

a beautiful night w_____ a bright full moon. I became really                 小题5:_______

emotional and began to cry ________(默默地) around the campfire.             小题6:____

Next _____ me was a camper of mine. She looked up at me                   小题7:_________

and noticed _____crying. She wrapped her arms around me                       小题8:

and gave me the biggest hug you could    _  (想象). Now I                     小题9:______

realize that even _____ a little kindness seems insignificant,                         小题10:_____

it truly can make all the difference in the world.

选择题