沉降罐停运放空操作时速度越快效果越好。

Men have always wondered about the earth they live on and about the ①_____ above them.

When early men looked at the night sky, they asked themselves a lot of questions. They looked at the moon, and wondered what this strange bright object in the sky was. They did not understand why it changed its shape from night to night. They looked at the stars and planets. They also wondered why some of them changed their positions, while others did not.

②他们也思考地球的形状。 Most early people believed the earth was flat.

③In different parts of the world, there were different ideas about the universe. The ancient Greeks were the first people to study the universe more scientifically. In the sixth century BC Pythagoras put forward the idea that the world was round. However, he could not explain why people at the bottom of the world did not fall off.

It was not until the sixteenth and seventeenth centuries that scientists found the answers to some important questions. ④With the help of Galileo’s telescope, people could see the sky more clearly, and find the positions of the stars and planets. Finally in 1665, Isaac Newton explained to the world what gravity (重力) was and people at last understood why they did not fall off the earth.

小题1:在文中①处填写一个单词，使得句意完整、上下文通顺。___________________

小题2:根据文章内容回答问题。

What questions did early men ask themselves when they looked at the night sky? Write down one of them.

_________________________________________________________________________

小题3:将文中②句翻译成英语。

_________________________________________________________________________

小题4:将文中③句翻译成汉语。

_________________________________________________________________________

小题5:写出文中④句的同义句，每空限填一词。

Galileo’s telescope made _________________ for people to see the sky more clearly, and to find the positions of the stars and planets.

下列词语书写完全正确的一项是[ ]

A．闲暇　缄默　按部就班　心无旁鹜

B．讪笑　狡黠　毛骨悚然　舐犊情深

C．诓骗　深邃　戛然而止　林次栉比

D．沧桑　蓬蒿　断壁残亘　苦心孤诣

下列语句中，没有语病的一项是[ ]

A．政府制定这项政策是为了方便群众办事，但是政府在施行这项政策的过程中却违背了自己的初衷，这其中的教训值得大家吸收。

B．由于历史的原因和现实的诱惑，中国文物流失的数量非常惊人。中国流失海外的文物究竟有多少？这恐怕是谁也无法准确回答的一个问题。

C．从“蒜你狠”到“豆你玩”，从“姜你军”到“糖高宗”，“物价持续上涨”成为2010年市民感受最深的经济现象，同时，也影响了市民的投资方式。

D．3月11日，日本本州岛附近海域发生9.0级特大地震，同时引发大规模海啸，专家表示，这次日本大地震的主要原因还是太平洋板块对欧亚板块的不断挤压造成的。

局部振动病的典型表现为

A．发作性手指变白

B．感觉迟钝

C．血管痉挛和变形

D．肌无力、肌萎缩

E．听力下降

以上四个遗传图中，肯定和血友病的遗传方式不一样的是（）

A.A

B.B

C.C

D.D