基于裂隙岩体的渗流特性,坝区渗漏模型划分为____,_____,____。

题型:填空题

问题:

基于裂隙岩体的渗流特性,坝区渗漏模型划分为____,_____,____。

考点:岩土工程基础知识岩土工程基础知识题库
题型:填空题
函数f(x)=
3
+4x
的零点所在的一个区间是(  )
A.(-2,-1)B.(-1,0)C.(0,1)D.(1,2)
题型:填空题

望舌的内容最早见于哪部医著的记载

A.《内经》

B.《难经》

C.《伤寒论》

D.《脉经》

E.《诸病源候论》

题型:填空题

在政策制定中从一个不同的评价角度来看待事物的政策学习类型是( )

A.工具学习

B.概念学习

C.社会学习

D.组织学习

题型:填空题

I came to live here where I am now between Wounded Knee Greek and Grass Greek。Others came too, and we made these little grey houses of logs that you see, and they are square. It is a bad way to live, for there can be no power in a square.

You have noticed that everything an Indian does is in a circle, and that is because the Power of the World always works in circles, and everything tries to be round. In the old days when we were strong and happy people, all our power came to us from the respectful circle of the nation, and so long as the circle was unbroken, the people were getting rich. The flowering tree was the living center of the circle, and the circle of the four quarters nursed it. The east gave peace and light, the south gave warmth, the west gave rain, and the north with its cold and strong wind gave strength and continuous power.

This knowledge came to us from the outer world with our brief. Everything the Power of the World does is done in a circle. The sky is round, and I have heard that the earth is round like a ball, and so are all the stars. Birds make their nests in circle, for theirs are the same as ours. The sun comes forth and goes down again in a circle. The moon does the same, and both are round. Even the seasons form a great circle in their changing, and always come back again to where they were. The life of a man is a circle from childhood to childhood, and so it is in everything where power moves.

Our places were like the nests of birds, and these were always set in a circle, the nation’s circle, a nest of many nests, where the Great Spirit meant for us to nurse our children.

But the “white people” have put us in these square boxes. Our power is gone and we are dying, for the power is not in us any more. You can look at our boys and see how it is with us. Where we were living by the power of the circle in the way we should, boys were men at twelve or thirteen years of age. But now it takes them very much longer to grow up.

小题1:According to the passage, the Indians _______.

A.don’t have modern instruments in their homes

B.refused to move from round places

C.lived in round places, but were forced to live in square houses

D.lived in round places, but then decided to move into square houses小题2:Two things being compared in the passage are _______.

A.the Indians’ past and present living conditions

B.the Indians’ past and modern beliefs

C.the Indians’ old and new power

D.people and nature小题3:In the second paragraph “the four quarters” refers to _______.

A.the four rooms of the Indian’s house

B.the four kinds of natural power

C.the four seasons

D.the four directions小题4:According to the author, once the Indians moved into square houses, _______.

A.they had to move to other houses

B.boys took more time to grow into men

C.they forgot the old way of life

D.everyone was not happy

题型:填空题

如右图所示,半径R=0.9m的四分之一圆形光滑轨道竖直放置,圆弧最低点B与长为L=1m的水平面相切于B点,BC离地面高h=0.45m,C点与一倾角为θ= 30°的光滑斜面连接,质量为m=1.0 kg的小滑块从圆弧顶点D由静止释放,已知滑块与水平面间的动摩擦因数µ=0.1,取g=10m/s2.试求:

(1)小滑块刚到达圆弧的B点时对圆弧的压力?

(2)小滑块到达C点时的速度?

(3)通过计算说明小滑块离开C点后是直接落到地面上还是直接落到斜面上?

   

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