题目

如图所示，在斜面上，木块A与B的接触面是水平的。连接木块A的绳子呈水平状态，两木块均保持静止。则木块A和木块B可能的受力个数分别为（ ） A . 2个和4个 B . 3个和4个 C . 4个和5个 D . 4个和6个 答案：A,C阅读理解     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 a 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 circles .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 Wasichus ( Indian word for " 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 be bull-grown.1 . According to the  passage , the  Indians ____________ . A. don't have modern instruments in their homesB. refused to take themselves away from round placesC. lived in round places, but then decided to move into square housesD. lived in round places , but were forced to live in square houses2. TWO things being compared in the passage are___________.    A. the Indians' today's and tomorrow's living beliefsB. the Indians' past and present living conditionsC. the Indians' old and new powerD. man's power versus natural power3. In the second paragraph "the four quarters" refers to_________. A. the four directionsB. the four rooms of the Indian's houseC. the four seasonsD. the four kinds of natural power4. According to the author, once the Indians moved into square houses,_______________.A. they had to move to other housesB. they forgot the old way of lifeC. boys took more time to grow into menD. everyone was not happy