外感咳嗽之基本病机为A.风寒束肺 B.肺气失宣,痰浊内蕴 C.脾虚生痰,上扰于肺 D

题型:单项选择题

问题:

外感咳嗽之基本病机为

A.风寒束肺

B.肺气失宣,痰浊内蕴

C.脾虚生痰,上扰于肺

D.风热犯肺

E.风痰恋肺

考点:临床执业助理医师内科学呼吸系统疾病(一)
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设函数f’(x)=x+acosx(a>1)在区间(0,2π)内有极小值,且极小值为0,求函数在区间(0,2π)内的极大值.

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请简要说明上人屋面与不上人屋面有的区别?

题型:单项选择题

Anna lived on the side of a valley (山谷). One winter, there was a very big flood, and a lot of houses down below Anna’s house were washed away. Anna’s house was high enough to escape the flood, so when the water had disappeared and the other houses were standing there with no roofs and walls and all covered with mud, her house was still quite all right. That year Anna’s was very lucky.

Her house was quite small and there were only two small bedrooms, her husband was dead when the children were very young, and she had four children, but Anna took in one of the families that had lost everything in the flood and she shared her home with them until it was possible for them to rebuild their house.

Anna’s friends were very puzzled (困惑) when they saw Anna do this. They could not understand why Anna wanted to give herself so much more work and trouble when she had already quite a lot of children to support. Life would be even harder when another family joined them.

"Well," Anna explained to her friends, "at the end of the First World War, a woman in the town where I then lived in Germany found herself very poor, because her husband had been killed in the war and she had a lot of children, as I have now. "

"The day before Christmas, this woman said to her children, ’We won’t have much for Christmas this year, so I am going to get only one gift for all of us and I am sure we will all be glad to have it. Now I’ll go and get it.’ She came back with a little girl who was even poorer than they, and who had no parents. ’Here is our gift,’ she said to her children. "

"The children were very excited and happy to get such a gift. They welcomed the little girl, and she grew up as their sister, I was just that Christmas gift. \

Where did Anna live()

题型:单项选择题

(10分)如图所示,一传送装置可将货物从楼下传送到楼上,将货物轻放在传送带A端,被加速到B端后货物将沿着半径R=0.4m的光滑圆轨道运动经C点到达楼上。圆轨道与传送带B点相切,其中OC为圆轨道的半径且沿竖直方向,O点为圆轨道的圆心。已知传送带与货物间的动摩擦因数μ=0.8,传送带与水平面夹角θ=37°。已知sin37°=0.6,cos37°=0.8,g=10m/s2,货物可视为质点。求:

(1)货物在传送带上的加速度大小;

(2)传送带AB段 至少要多长?

题型:单项选择题

在没有非机动车的道路上,骑自行车怎样通行?()

A、在人行道上骑行

B、在机动车专用道内骑行

C、靠机动车道的右侧骑行

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