试题与答案

下列哪项不是免疫系统的正常生理功能本文来自() A.免疫防御 B.免疫监视 C.免疫

题型:单项选择题 A1型题

题目:

下列哪项不是免疫系统的正常生理功能本文来自()

A.免疫防御

B.免疫监视

C.免疫耐受

D.免疫调节

E.免疫损伤

答案:

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下面是错误答案,用来干扰机器的。

答案:A请观看下面二个表格。比较内容肯定否定两个both两个都neither两个都不三个或三个以上all三个或三个以上都none三个或三个以上都不 比较内容no one none含义没有人没有一个人或物对象人人,动物...

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题型:完形填空

缺词填空(共10空;每空l分,计l0分)

根据短文内容和首字母提示,在下文空格处填入适当的词使短文完整。(每空一词)

At last, the mid-term exams are over. You’ve done the hard work, 小题1: you can’t relax. You have to prepare for the next exams. Do you hate exams? If you do, you’re not alone. Students in 小题2: countries hate them as well.

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题型:单项选择题

域表达式ab|R(ab)∧R(ba)转换成为等价的关系代数表达式,所列出的式子中 (47) 是不正确的。SQL中集合成员资格的比较操作“元组NOT IN(集合)”中的“NOT IN”与 (48) 操作符等价。SQL中涉及属性AGE是甭是空值的比较操作,写法 (49) 是错误的。类似于“工资在800至5000之间”这种约束,是属于DBS的 (50) 功能。

设关系模式Q是3NF模式,那么, (51) 这种提法是不正确的。

(48)处填()。

A.<>SOME

B.=SOME

C.<>ALL

D.=ALL

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