粒细胞-巨噬细胞集落激因子(GM-CSF)是由何细胞受抗原刺激诱导产生的A.T淋巴细

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问题:

粒细胞-巨噬细胞集落激因子(GM-CSF)是由何细胞受抗原刺激诱导产生的

A.T淋巴细胞

B.内皮细胞

C.成纤维细胞

D.以上均是

考点:医学三基(临床输血学)第五章造血细胞因子第五章造血细胞因子题库
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一些原发性自然灾害还可导致(),形成次生灾害链。

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有关义齿就位的方向与模型倾斜的关系,下列说法错误的是()

A.模型向前倾斜时,义齿由前向后戴入

B.模型向后倾斜时,义齿由后向前戴入

C.模型向左倾斜时,义齿由左向右戴入

D.模型向右倾斜时,义齿由右向左戴入

E.以上都是

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阅读理解

     Many people find it difficult to do any activity for pure pleasure.I'm here to tell you about one of my

favorite pleasures.It doesn't cost a thing and takes very little time.Best of all, you can do it for pure

enjoyment.It's walking.

     There's something about walking that's different from jogging.When I'm jogging, I'm constantly

challenging myself to go farther or faster, sweat more, and breathe harder.But when I'm walking, I'm

taking time to go outside and put one foot in front of the other while I look around, breathe, and feel the

sun and the wind.When I walk, I'm submerging(浸没) myself in life.

     On walks, I make friends with myself.That little voice in my head asks, "How are you going to finish

three major projects this week?" I answer, "Now, calm down.This is your time.No deadlines, no projects, no havetodos."

      Walks alone and walks with companions each have their own pleasures.On walks with companions

, acquaintances become friends and friendships deepen.There are always memories and thoughts to share on walks.

     I also enjoy walking anywhere with my children, who constantly open my eyes to new

discoveries-rolling down a hill, or finding a strange rock.Walking expands their minds and teaches them

about nature.

      Years ago, when I read "Pride and Prejudice", I noticed Elizabeth Bennet walked three miles to visit

her sister.Then I learned that the Romantic poets-William Wordsworth, John Keats, and Percy Bysshe

Shelley-frequently walked for hours for creative inspiration.I might not have been able to write like these poets but I could take walks as they did, I thought.Then I became interested in the activity.

     Because I walk so often, I now have a list of my favorite walking spots.One of my favorite spots is a

park near my house.The park lets me experience the cycle of the seasons at my convenience.

     Where else can you appreciate the beauty in the world except on a walk? Why not take a walk and

do it for pleasure?

1. Compared with jogging, walking ________.

A. is more boring  

B. is more relaxing

C. needs more energy  

D. takes less time

2. The author seems to believe that ________.

A. walks may help promote friendship

B. walks help build children's independence

C. one had better walk without companions

D. one can solve hard problems during walks

3. From Paragraph 6 we learn ________.

A. the benefits of reading

B. why the author loves poems

C. how the author started walking

D. the importance of creative inspiration

4. Why does the author write the passage?

A. To stress the importance of literature.

B. To give advice about daily exercise.

C. To show the benefits of doing sports.

D. To recommend walking to the readers.

题型:单项选择题

肝棘球蚴病的并发症中下列哪一项不正确()

A.囊肿继发感染

B.囊肿破裂

C.囊肿支气管瘘

D.过敏性休克

E.脑部转移

题型:单项选择题

装载动物出境的汽车,其检疫要求是______。

A.装栽后,应当在口岸出入境检验检疫机关监督下进行消毒处理
B.装载前,应当在口岸出入境检验检疫机关监督下进行熏蒸处理
C.装载后,应当在口岸出入境检验检疫机关监督下进行熏蒸处理
D.装载前,应当在口岸出入境检验检疫机关监督下进行除害处理

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