多形渗出性红斑属 A．感染性疾病 B．传染性疾病 C．变态反应_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题

多形渗出性红斑属

A．感染性疾病

B．传染性疾病

C．变态反应疾病

D．遗传性疾病

E．自身免疫性疾病

答案

参考答案：C

改错题

短文改错。
     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：
     如果有错误(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(\)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。

My swimming experience is extreme interesting. There was
a time that I swam like a rock. This went on until one day
when was fishing with a friend at nearby pond.
I fall into it. If my friend had not come to my rescue,
I would have drowned. Ever since then I have came
to know the important of learning to swim I didn’t
attend to any training class but learned it on my own. Strange
to say. I have no difficulty swim at all now. Though my
self-invented styles looks awkward (笨拙的), at least they call
keep my floating. Thinking of this, I am more than satisfied.

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单项选择题

电子商务的（）主要是考虑限制用户对用于电子商务系统的计算机的访问权限，防止未授权的用户对系统的访问以及越权访问。

A.计算机系统安全

B.网络安全

C.数据安全

D.应用安全