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【单选题】
免疫监视是指机体
A.
清除衰老和损伤的细胞,维持机体内环境平衡的作用
B.
对抗原性异物表现出无反应性的状态
C.
识别并清除人侵的各种病原生物的作用
D.
识别并清除体内突变细胞的作用
E.
识别人侵的抗原性异物,并发生反应的现象
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参考答案:
举一反三
【多选题】以下关于千分尺读数正确的是
A.
测量前,应对好零位
B.
测量时利用测力装置使两量面与被测工件接触
C.
从固定套管上露出的刻线读出被测工件毫米整数和半毫米数
D.
不足一格的数,即千分之几毫米,由估读法确定
【判断题】汉武帝占领了敦煌地区以后建立了一个关叫玉门关,是因为(这是玉进入中国的一个关口)。()
A.
正确
B.
错误
【单选题】请指出以下情况引起的误差:(1)千分尺的零点不准;(2)游标尺的分度不均匀;(3) 电流计零点漂移;(4) 天平不等臂;(5)电压起伏引起电表读数不准;(6) 不良习惯引起的读数误差。属于系统误差的是:
A.
(1)(2)(3)
B.
(1)(2)(4)
C.
(2)(3)(5)
D.
(2)(4)
【单选题】Everyone must be responsible for their own behavior, and most of the young people today are interested, as far as I can perceive, in taking their knocks, just as adults must take theirs.
A.
taking their jobs
B.
sharing their ideas
C.
assuming their responsibilities
D.
shaking off their responsibilities
【简答题】读出以下千分尺的读数 a.( ),b.( )
【单选题】Today, most of people won't study either Greek or Latin because ______.
A.
they are no longer important
B.
people do not have enough time
C.
they are no longer existed
D.
people can not learn them well
【简答题】By “But to...it is not so”(Line 7) the author implies that _____. [A] most people are just followers of new ideas [B] even sound minds may commit silly errors [C] the popularly supported may be errone...
【简答题】B Among the most popular books being written today are science fictions (小说). Hundreds of titles are published every year and are read by all kinds of people. Furthermore, some of the most successful ...
【判断题】汉武帝占领了敦煌地区以后建立了一个关叫玉门关,是因为(这是玉进入中国的一个关口)
A.
正确
B.
错误
【单选题】Passage Two Most people want to work, but it has become more difficult in today's world to find work for everybody. The economies(经济) of the world need to grow by 4% each year just to keep the old num...
A.
people will have no jobs
B.
people can still have jobs as before
C.
4% of the people will have jobs
D.
97% of the people will have jobs
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