相关试题
【单选题】
T细胞阴性选择中，被清除的细胞是
A. 与抗原肽-MHC过高亲和力结合的sp细胞
B. 哈哈哈
【单选题】
胸腺细胞阳性选择的结果是
A. T细胞获得对抗原识别的MHC限制性
B. 哈哈哈
【单选题】
胸腺细胞阴性选择的结果是
A. T细胞对自身抗原形成中枢免疫耐受
B. 哈哈哈
【单选题】
自身反应性T淋巴细胞通过那种机制被消除
【单选题】
Th细胞对CTL的辅助作用是
A. 分泌细胞因子，促进CTL增值分化
B. 哈哈哈(ಡωಡ)hiahiahia
【单选题】
Th细胞对B细胞的辅助作用是
A. 表达CD40L，给B细胞活化提供第二信号
B. 哈哈哈(ಡωಡ)hiahiahia
【单选题】
b细胞约占外周淋巴细胞总数的
A. 20%
B. 哈哈哈(ಡωಡ)hiahiahia
C. 🙌
D. 🖕
【单选题】
可与Th细胞表面CD4分子结合的是
A. MHC II类分子 的b2结构域
B. 嘿嘿嘿
【单选题】
关于HLA II类分子的叙述，正确的是
【单选题】
表达HLA II类类分子的细胞，错误的是
【单选题】
可被MHC II类分子抗原结合慒容纳的抗原肽长度一般为
【单选题】
来自母体能引起新生儿溶血症的Rh抗体是
【单选题】
Ig的生物学功能不包括
A. 抗原抗体复合物形成后，Ig可直接溶解靶细胞
B. 嘿嘿嘿
【单选题】
单克隆抗体的特点，不包括
A. 所有单克隆抗体对人均无免疫原性
B. 嘿嘿嘿
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The speaker, ______ for her splendid speeches, was warmly received by the audience.
A. having known
B. being known
C. knowing
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【单选题】
No sooner had we reached the top of the hill ______ we all sat down to rest.
A. when
B. then
C. than
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___ energy under the earth must be released in one form or another, for example, an earthquake.
A. Accumulated
B. Gathered
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A. engaged
B. comfort
C. execute
D. forgive
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Sometimes it is very difficult to ___ some of the English words. Even the native speaker cannot help.
A. decrease
B. create
C. define
D. delight
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In the wife’s eyes, his ___ to their marriage life is far from perfect.
A. requirement
B. commitment
C. participation
D. reflection
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This newspaper often ___ the government’s opinion, not the public opinion.
A. affects
B. reacts
C. reflects
D. recognizes
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It is predicted that heavy rains are ___ to flood the area in a few days.
A. frightening
B. threatening
C. scattering
D. warning
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I chose to work abroad to improve my career ___.
A. future
B. path
C. prospect
D. expect
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Long before I ever went there, Africa was alive in my ___.
A. image
B. imaginary
C. imaginative
D. imagination
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The spectacle of the aurora may appear to dazzle and ___ the observer’s eye.
A. enchant
B. charm
C. fascinate
D. draw
【单选题】
The top prize has enhanced the musician’s ___.
A. fame
B. status
C. courage
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Compared with Westerners, the ___ use less butter. They prefer the very healthful peanut oil.
A. foreigners
B. Southerners
C. Northerners
D. Orientals
【单选题】
Within a few days she had become seriously ill, ___ great pain and discomfort.
A. surviving
B. suffering
C. affecting
D. accepting
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People of their generation who lived through World War II have ___ memories of confusion and incompetence.
A. vivid
B. strong
C. acute
D. profound
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Not a breath of fresh air ___ the long white curtains.
A. blew
B. stirred
C. whirled
D. stung
【单选题】
Figures showed customer complaints had ___ to record levels and profits were falling.
A. added
B. climbed
C. accumulated
D. soared
【单选题】
Thanks for the advice, but this is something I have to ___ out myself.
A. fulfill
B. identify
C. figure
D. claim
【单选题】
A ___ monument has been erected in Tian An Men Square in honor of the people’s heroes.
A. magnificent
B. gorgeous
C. huge
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Vietnam made an official ___ that the meeting be postponed.
A. require
B. requirement
C. request
D. agreement
【单选题】
Luke was allowed to sit directly behind the pilot and ___ with him.
A. converse
B. inverse
C. perverse
D. diverse
【单选题】
Maybe this work is not ___, but it will live for a while.
A. mortal
B. deadly
C. immortal
D. worldly
【单选题】
This is why emerging economies set themselves to ___ vast foreign currency reserves in this decade.
A. gather
B. accumulate
C. accelerate
D. assemble
【单选题】
This will enable the audience to sit in ___ while watching the shows.
A. comfort
B. rest
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【单选题】
Throughout the house, the views are a constant source of surprise and ___.
A. grief
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【单选题】
Imagination is sometimes more ___ than reality.
A. vivid
B. real
C. bright
D. rich
【单选题】
It is but a step from the ___ to the ridiculous.
A. interest
B. top
C. bottom
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【单选题】
My educational ___ is simple: learning should be fun.
A. philosophy
B. psychology
C. physiology
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【单选题】
I chose to work abroad to improve my career ___.
A. future
B. path
C. prospect
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【单选题】
Meg stared at her ___ in the bedroom mirror.
A. shadow
B. reflection
C. figure
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【单选题】
Such technology, however, remains firmly in the ___ of science fantasy.
A. realm
B. region
C. direction
D. district
【单选题】
Long before I ever went there, Africa was alive in my ___.
A. image
B. imaginary
C. imaginative
D. imagination
【单选题】
As a member of the International Olympic Committee her fares and hotel ___ were paid by the IOC.
A. fees
B. allowances
C. expenses
D. money
【单选题】
If they were captured they wished to die, believing that they would go to ___.
A. parasite
B. paradise
C. paraphrase
D. paralyze
【单选题】
Have you ever read Jane Austin's ___ novel Pride and Prejudice?
A. classical
B. class
C. classified
D. classic
【单选题】
She says that being with a ___ mate, one will naturally forget all the worries.
A. heart
B. spirit
C. soul
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【单选题】
For teenagers, pregnancies, alcoholism, drugs and ___ are all part of the same sad resume.
A. dropouts
B. drop-in
C. drop-off
D. drop-by
【单选题】
The teacher required that no books ___ all over the place in the study.
A. are scattered
B. be scattered
C. were scattered
D. have scattered
【单选题】
Herbs have been used for centuries to endow a whole range of foods ___ subtle flavors.
A. for
B. in
C. with
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【单选题】
He ___receive two specific compliments than twenty vague generalities.
A. should rather
B. would rather
C. would better
D. had rather
