关于“髓母细胞瘤”,下列要点哪项不对()A.男孩多见 B.多位于小脑 C.圆形或卵圆

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问题:

关于“髓母细胞瘤”,下列要点哪项不对()

A.男孩多见

B.多位于小脑

C.圆形或卵圆形

D.常为环形强化

E.瘤周水肿轻

考点:医学影像技术(医学高级)MRIMRI题库
题型:单项选择题

阅读理解。

Joe: What do you do on weekends?

David: Well, I usually have to study on Saturdays.

Joe: And how about Sundays?

David: Well, we have lunch together. You know, all of the members of my family.

          Then after lunch, I go to the park and meet my friends.

Joe: Oh? What do you do there?

David: We play football. After that I usually go to see a film outside the city.

Joe: Do you often go out of the city?

David: About once a month. My uncle has a small farm.

Joe: It's nice. Do you go alone?

David: No, my mum, my two sisters and some of my friends go there, too.

Joe: But why do you go there?

David: Many things: green trees, clean air, and there are few people.

1. What does David do on Saturdays? [ ]

A. Study.

B. Go to the park.

C. Play football.

D. Go out.

2. Who has lunch with David on Sundays? [ ]

A. No one.

B. The whole family.

C. His friends.

D. His uncle.

3. Where do they play football?[ ]

A. At school.

B. In the park.

C. Out of the city.

D. In a farm.

4. Who does not go to David's Uncle's farm? [ ]

A. David's mother.

B. David's father.

C. David's sisters.

D. David's friends.

5. Why do they go to the farm? [ ]

A. Green trees.

B. Clean air.

C. Few people.

D. A, B and C.

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老年男性,既往有肺结核病史,近2个月咳嗽、咳痰、痰中带血,伴发热,消瘦。为排除肺癌,最有鉴别意的是()

A.全身中毒症状

B.家族遗传病史

C.咳嗽、咳痰、咯血症状

D.痰液检查

E.吸烟史

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2005年10月12日我国成功发射了“神舟”六号宇宙飞船,发射升空后,由运载火箭将飞船送入距地球表面近地点高度约为250km、远地点高度约为350km的椭圆轨道A上,飞行若干圈后在远地点按指令点火,加速变轨,进入预定的圆轨道B做圆周运动,则在此过程中以下说法正确的是(  )

A.飞船在椭圆轨道A上由近地点向远地点运动时机械能逐渐增大

B.飞船在预定圆轨道B上所具有的机械能大于飞船在椭圆轨道A上的机械能

C.在椭圆轨道A上由近地点向远地点运动的过程中,万有引力对飞船做负功

D.飞船在圆轨道B上运动时,速度和加速度都保持不变

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