MG发病机制叙述不正确的是() A.MG患者外周血中均能检测到AChR特异性抗体 B

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问题:

MG发病机制叙述不正确的是()

A.MG患者外周血中均能检测到AChR特异性抗体

B.10%~15%MG患者合并胸腺瘤,70%患者有胸腺肥大

C.在正常和增生的胸腺中都能发现“肌样细胞”具有横纹并载有AChR

D.由于病毒或其他特异性因子感染胸腺后,导致“肌样细胞”表面的AChR构型发生变化,刺激机体产生AChR抗体

E.AChR的IgG抗体是由周围淋巴器官、骨髓、胸腺的浆细胞产生

考点:神经内科神经系统常见病神经系统常见病题库
题型:单项选择题

近似数1.23×105精确到(    )位,有(    )个有效数字.

题型:单项选择题

选出下列所有正确的叙述。()

A.外显子以相同顺序存在于基因组和cDNA中 

B.内含子经常可以被翻译 

C.人体内所有的细胞具有相同的一套基因 

D.人体内所有的细胞表达相同的一套基因 

E.人体内所有的细胞以相同的方式剪接每个基因的mRNA

题型:单项选择题

句型转换。

1. Would you like to go to the park with us? (同义句)

    ________ ________ going to the park with us?

2. The computer is very useful. (改为感叹句) 

                                  the computer is!

3. My pet pig is so big. She can't sleep in the house. (同义句)

    My pet pig is                                              sleep in the house.

4. The girl is 6 years old. (同义句)

    She is a                girl.

5. She doesn't want that pen. She wants this one. (同义句)

    She wants this pen                               that one.

6. The best way of going there is by plane. (同义句)

    The best way                                              is by plane.

7. Why don't you get some flowers? (同义句)

                                 get some flowers?

题型:单项选择题

根据实际经验,在视线良好时,对岛礁的辨认,从视距和清晰度方面下列正确的是:()

A.雷达更有效且辨认清楚

B.雷达更有效但辨认不清楚

C.目力更有效且辨认清楚

D.目力更有效但辨认不清楚

题型:单项选择题

设计文件中A4~A6级起重机的金属结构应进行疲劳验算。

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