科学家研究发现一种树突状细胞(DC细胞),在免疫反应中有强大的摄取、处理和传递抗原的

题型:填空题 案例分析题

问题:

科学家研究发现一种树突状细胞(DC细胞),在免疫反应中有强大的摄取、处理和传递抗原的功能。图示DC细胞参与免疫的过程,请回答问题:

 

T细胞发生免疫效应时,它产生的()可刺激()细胞增殖分化;效应T细胞也能直接作用于被抗原入侵的靶细胞,发生()免疫。

考点:高中生物免疫调节免疫调节题库
题型:填空题 案例分析题
阅读下面短文,掌握其大意。然后从各题所给的ABCD四个选项中,选出最佳选项,并在答题卡上将该项涂黑。
A large crowd of frogs were traveling through the forest but unluckily two of them fell into a deep pit. All the others 36  the pit .Seeing how  37  the pit was, they told the two frogs that they might be  38 dead .The two frogs  39  what the other frogs were saying and  40  to jump up out of the pit with all of their physical 41. The other frogs kept telling them to stop. In the end one of the frogs  42 trying , fell down and died. 43 , the second frog kept jumping as hard as she could despite the  44   remarks. Finally, with one giant leap, she 45  it out of the pit!
This amazing 46  was that the second frog was 47  and unable to hear what the others had been saying. She thought they had been 48  her on the whole time they were yelling!
The story above 49 us two lessons: Firstly ,there is 50  of life and death in the tongue. An encouraging word to someone who is 51  can lift them up and help them make it through the day. Secondly, a negative word to someone who is down can be  52  it takes to kill them. The power of words is great. Facing others’ criticism or laughter, we should turn a deaf 53  to it and have a  positive attitude. Thus we can reach our goals just as the second frog did .In one word, we need the  54  to guide us to the proper way , so as not to be blindly 55 by worldly opinion in difficult times.
小题1:
A.gathered aroundB.got roundC.jumped intoD.escaped from
小题2:
A.dangerous B.broadC.narrowD.deep
小题3:
A.as long asB.as well asC.as soon asD.as good as
小题4:
A.confusedB.toleratedC.ignoredD.misunderstood
小题5:
A.managedB.triedC.agreedD.promised
小题6:
A.energyB.powerC.forceD.strength
小题7:
A.gave inB.gave upC.gave outD.ran out
小题8:
A.ThereforeB.HoweverC.BesidesD.But
小题9:
A.innocentB.activeC.negativeD.positive
小题10:
A.madeB.turnedC.leftD.worked
小题11:
A.reasonB.consequenceC.factorD.fact
小题12:
A.deafB.cleverC.disabledD.confident
小题13:
A.forcingB.keepingC.comfortingD.cheering
小题14:
A.givesB.tellsC.teachesD.shows
小题15:
A.function B.powerC.usageD.skill
小题16:
A.downB.upC.ridiculousD.angry
小题17:
A.whichB.thatC.whatD.who
小题18:
A.directionB.attitudeC.faceD.ear
小题19:
A.supportB.wisdomC.determinationD.knowledge
小题20:
A.fooledB.supportedC.opposedD.guided
题型:填空题 案例分析题

关于液化气油气的特性描述正确的是()

A.常温常压下为气体只有在加压和降低温度条件下才变为液体

B.液化石油气的闪点沸点都较高

C.密度比空气重

D.液化石油气无色透明是有烃类的特殊味道

题型:填空题 案例分析题

当一个文档窗口被关闭后,该文档将()。

A、保存在外存中;

B、保存在内存中;

C、保存在剪贴板中;

D、既保存在外存也保存在内存中。

题型:填空题 案例分析题

冲击气缸的喷嘴的直径约为缸径的()。

A、1/3

B、1/5

C、1/7

题型:填空题 案例分析题

水中桥墩中心位置的测设一般采用()进行。

A.极坐标法

B.直角坐标法

C.距离交会法

D.角度交会法

更多题库