微粒甲与离子乙在溶液中的转化关系如图所示:甲是 A.Si B.NH4+ C.Al

题型:选择题

问题:

微粒甲与离子乙在溶液中的转化关系如图所示:甲是

A.Si

B.NH4

C.Al

D.SO2

考点:离子方程式
题型:选择题

股骨转子间骨折分型中属稳定性骨折的是()。

A.顺转子间型

B.反转子间型

C.转子下型

D.顺转子间粉碎型

E.反转子间粉碎型

题型:选择题

克隆羊多莉的培育过程是:母羊A的乳腺细胞核与母羊B的去核卵细胞融合,形成一个新细胞,体外培养形成胚胎,然后植入母羊C的子宫内发育,足月分娩,产下多莉。根据遗传信息传递的原理,你认为克隆羊多莉应该像                           (  )

A.A羊

B.B羊

C.C羊

D.每个都像一点,更像C羊

题型:选择题

绝热材料与吸声材料一样,都需要孔隙结构为封闭孔隙。()

题型:选择题

阅读理解。

     It is the summer of 1776. Thomas Jefferson is not happy. He'd rather be home in Virginia than attending

Philadelphia's Continental Congress(大陆会议)

     Thomas Jefferson knew he had a job to do. Important men throughout the American colonies (殖民地)

were meeting in Philadelphis to discuss and debate the war with Great Briain. The colony of Virginia sent

Thomas Jefferson to Philadelphia. But Jefferson wasn't happy. Jefferson wanted to be home that hot summer

of 1776. he missed his wife, Martha. She hadn't been feeling well when he left, and he worried about her.

     On June 7, 1776, Richard Henry Lee from Virginia stood up at the Congress and announced that "these

American colonies ought to be free and independent states." Jefferson probably knew what was coming next.

Here was another resolution (决议)to debate. And whenever there was a resolution, there was a declaration.

     The American colonies had been at war with Great Britain for more than a year, but surprisingly. The

colonies had not formally announced their independence. So the Congress appointed a five-man committee to

crate a document declaring America's independence. And the committee chose Thomas Jefferson to write it.

     Jefferson knew he was to list the unfair things Great Britain had done to the colonies. For days and days,

Jefferson wrote and rewrote about the king and his unfair laws. About independence. About freedom. He

borrowed ideas from other political writers, but he wrote these thoughts in words that all people could

understand. He wanted his ideas to be shared with everyone.

     And they were. The Continental Congress voted to adopt the Declaration of Independence on July 4, 1776.

on July 8, it was read out loud to a cheering crowd. No one knew who the author was, but they knew what

the Declaration stood for-independence and freedom for all.

     Still, Thomas Jefferson dreamed of home. In late July he begged Richard Henry Lee to replace him in the

Congress. In September, Jefferson's dream finally came true, and he traveled home.

      Since then, the words Thomas Jefferson wrote during that hot Philadelphia summer have inspired people

throughout the world. Thank goodness Jefferson didn't go home.

1. Why didn't Thomas Jefferson want to go to Philadelphia?

A. He was not a good debater

B. He found a new job in Virginia

C. It was extremely hot in Philadelphia

D. He was concerned about his wife's health

2. The Continental Congress set up a committee to write a document to _____.

A. officially declare war on Britain

B. announce the American colonies were free

C. inspire soldiers fighting against Britain

D. revise the Declaration of Independence

3. The underlined word "they" in Paragraph 6 refers to _____.

A. people in the colonies

B. members of the Congress

C. Jefferson 's ideas

D. ideas of other writes

4. What do we know about the Declaration of Independence?

A. It was written in quite simple words

B. It took Jefferson about one year to write it

C. Jefferson finished it with the help of Richard Henry Lee

D. It won Jefferson great honors immediately it was announced.

5. We can learn from the passage that _____.

A. Jefferson was a very caring husband

B. Jefferson was not really interested in politics

C. Jefferson was unwilling to borrow other writers' ideas

D. Jefferson finished his job in the Congress before going home

题型:选择题

新航路的开辟有其深刻的社会根源,主要是指()

A.资本主义生产关系的产生

B.欧洲各国商品经济的发展

C.欧洲人对黄金和货币的狂热追求

D.地圆学说的提出

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