题干

(2015•陕西)在“探究浮力的大小跟哪些因素有关”的实验时,小丽提出如下猜想:

猜想一:浮力的大小跟物体排开液体的体积有关;

猜想二:浮力的大小跟液体的密度有关;

猜想三:浮力的大小跟物体的密度有关.

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同类题1

阅读理解

C

    Yangzhou paper-cutting, with a history of 2,000 years, can be dated back to the Sui Dynasty, making Yangzhou one of the places where paper-cutting first became popular.

    In the Sui Dynasty, the people of Yangzhou would cut colourful paper or silks and satins(缎子) to celebrate festivals. It is said that Emperor Yang came to Yangzhou three times. In winter, the flowers and trees in the garden become dry and weak. The Emperor ordered the girl servants to cut fine silks and satins into flowers and leaves and use them to decorate the trees and lakes, copying nicely the looks of spring and summer. Since then, “colorful brocade cutting” (织锦缎) has become a popular art in Yangzhou.

    In the Tang Dynasty, the paper-cutting industry was highly developed and a large amount of high-quality paper was made as presents to the Court(宫廷).

    In the Qing Dynasty, because of the economic development, the people of Yangzhou became interested in wearing fine clothing, especially embroidered clothing(刺绣). The embroidered designs was based on paper-cuts. The most well-known of them was Bao Jun, a paper-cutting master. He won a high reputation(名声) as Magic Scissors(剪刀) for his wonderful cutting skills.

    After the People's Republic of China was started, the Chinese government accepted the importance of paper-cutting like many other arts and skills. In 2007, China Paper-cuts Museum opened to the public in the back garden of the Wangs' Residence(住所), Yangzhou, greatly helping the development of Yangzhou paper-cutting.

同类题3

阅读下面短文, 掌握其大意, 然后从各题所给的A、B、C、D四个选项中选出最佳选项。

    A boy thought that he was the most unhappy person in the world. In his opinion, he was unlucky because almost everything 1always happened to him. He wanted to find the 2 to happiness. He walked a long way and finally came to a beautiful palace. There, he met the king.

    After learning 3 the boy came, the king suggested that he should look around the palace and come back in two hours. “At the same time, I want you to hold this spoon 4 milk,” said the king. “As you walk around my palace, carry this spoon 5 without spilling the milk.”

    The boy kept his eyes fixed on the spoon and began to walk around the golden palace. After two hours, he came back to the king. “Well,” asked the king. “Did you 6 the wonderful paintings in my dining hall? Did you enjoy the colorful flowers in the garden?” The boy felt sorry because he saw 7.  He only paid attention to the milk.

    "Then go back and you can see the beauty of my world.” said the king. This time the boy saw all of the works of art on the walls. He saw the great gardens and hills all around. He had a great time 8 he was walking around the palace. When he 9, he described everything he saw.

     "But where is the milk?” asked the king. Looking down at the spoon he held, the boy saw the milk was gone. “Well, there is only one piece of 10 I can give you,” said the king. “The secret to happiness is to see all the beauty of the world and also keep an eye on the milk on the spoon.”