下列不能引起种群基因频率改变的因素是（） A.新生基因的加入 B.自然选择 C.基因

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.

15年前出具的为某笔房地产抵押贷款服务的估价报告等估价资料，该笔房地产抵押贷款期限为20年，现在这些资料不用再继续保管。（）

《安全生产法》规定，危险物品是指易燃易爆物品、危险化学品、放射性物品等能危及人身安全和财产安全的物品。

（）交易为非金融性交易。

A.现金通存录入

B.转账通存录入

C.现金通兑录入

D.转账通兑录入

破伤风的面容是

A．贫血面容
B．苦笑面容
C．二尖瓣面容
D．伤寒面容
E．黏液水肿面容