信号机按其用途分为进站信号机、出站信号机、()、通过信号机、调车信号机。

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问题:

信号机按其用途分为进站信号机、出站信号机、()、通过信号机、调车信号机。

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什么叫平面突进系数?

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患者,女,42岁,突发右下腹阵发性绞痛3小时,伴恶心,未呕吐。近年来有多次同样发作史。检查:腹柔软,右下腹深压痛,右侧肾区叩痛。尿常规:白细胞少数,红细胞(+++)。应首先考虑的诊断是()。

A.麦克尔憩室炎

B.急性阑尾炎

C.不完全肠梗阻

D.右输尿管下段结石

E.右侧附件炎

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根据房屋共有建筑面积的不同使用功能,应分摊的共有建筑面积可分为( )。

A.区共有建筑面积

B.幢共有建筑面积

C.本层共有建筑面积

D.功能共有建筑面积

E.本单元共有建筑面积

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My mother is a diligent and kind woman. She is very busy from morning till night. As a teacher, she works hard.   小题1:    Both my brother and I love her dearly as she loves us.

My mother has been teaching math at a middle school in my hometown. She goes to work early in the morning and does not return home until late in the afternoon.    小题2:  She treats them with patience and teaches them well. For her excellent quality and very good teaching results, she has been elected as a model teacher several times.

  小题3:    Every day, when she comes back home from work, she sets about doing housework, sweeping the living room and bedrooms or cleaning the furniture, and putting everything in good order. She seems to be busy all the time. As she has been very busy working every day, she looks older than her age. But she looks as cheerful and happy as ever. Mother never buys expensive dresses for herself, but she often buys some inexpensive but high quality clothes for us.  小题4:    She just eats a plain meal outside when she is too busy to cook herself. She lives a busy yet simple life, without any complaints.

Often she says to us, “work while you work, and play while you play. That is the way to be happy and gay. If you do not work, you will become lazy and be of no use to society”. What a piece of good advice this is!   小题5: This advice of hers will always serve as a guide to my behavior. My mother is great indeed, and I always feel proud of her.

A.She enjoys listening to classic music.

B.As a mother, she takes good care of us and gives us every comfort.

C.She loves her students and cares for them.

D.She never goes to expensive restaurants to enjoy meals.E. My mother is hard-working and never wastes money.

F. I never forget it and always bear it in my mind.

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患者男,63岁,上颌全牙列缺失,散在骨尖。下颌多数牙缺失,仅余近中舌侧倾斜,牙槽嵴丰满,猞间距离正常

不需要缓冲的区域是().

A.上颌硬区

B.下颌隆突

C.腭皱

D.下颌舌骨嵴

E.上颌颊系带

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