问题 单项选择题

关于呕血与便血的概念,下列叙述错误的是()。

A.呕血是指由上消化道疾病所致的消化道出血,血液经口腔呕出

B.由鼻腔、口腔、咽喉部出血吞咽后再呕出,也称呕血

C.消化道少量出血,隐血试验可为阳性

D.便血的病因可以为上消化道疾病,也可以为下消化道疾病

E.便血的颜色可呈鲜红色、暗红色或黑色

答案

参考答案:B

多项选择题
改错题

短文改错(共10小题;每小题1.5分,满分15分)

此题要求改正所给短文中的错误。对标有题号的每一行做出判断:如无错误,在该行右边横线上画一个勾(√);如有错误(每行只有一个错误),则按下列情况改正:

该行多一个词:把多余的词用斜线(﹨)划掉,在该行右边横线上写出该词,并也用斜线划掉。

该行缺一个词:在缺词处加一个漏字符号(∧),在该行右边横线上写出该加的词。

该行错一个词:在错的词下划一横线,在该行右边横线上写出改正后的词。

注意:原行没有错的不要改。

Dear Sir,

How are you? As an exchange student, I am writing to       小题1:_______

tell you I would prefer to move into a single room in next     小题2:_______

term, as I found it inconvenient to share a room with others.  小题3:_______

My roommate often holds parties at night, made much noise. 小题4:_______

Besides, his friends are always visiting him, that disturbs me  小题5:_______

a lot. So I hope to draw your attentions to this problem. If     小题6:_______

you think in my position, I am sure he will agree that the      小题7:_______

only solution for me is get a room of my own, one not in the   小题8:_______

same building and as near to the school campus as possible.   小题9:_______

I would be thankfully if you could do me the favor.           小题10:_______

Yours sincerely,

Li Ming