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In the early days of our country, Virginia served as the breeding ground of presidents. Of the first five presidents, four were Virginians. The Father of His country and the first president was George Washington. He was born in Westmoreland County, Virginia, and spent his later years at MT. Vernon, his estate in Virginia. The third President, Thomas Jefferson, was also a native Virginian. Raised in what is now Albemarle County, Virginia, he found the University of Virginia. His home in later years was Monticello, near the University, James Madison, the fourth president, was born in Port Conway, Virginia, and helped draft the constitution for the state of Virginia. James Monroe, the fifth president, was born, like Washington, in Westmoreland County; he was educated at the college of William and Mary in Williamsburg and studied law under Thomas Jefferson.
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【简答题】What is a main concern of the writers of Generation O? A.How Obama is going to live up to young people's expectations. B.Whether America is going to change during Obama's presidency. C.Whether young p...
【单选题】配置复方碘溶液的正确操作是
A.
先将碘化钾配制溶液,再加入碘使溶解,然后加水稀释至刻度
B.
先将碘加入适量水中,然后加入碘化钾使形成复盐进行助溶,最后加水定容至刻度
C.
先将碘和碘化钾充分混匀,然后加入适量水形成复盐,最后加水定容至刻度
D.
先分别将碘和碘化钾各加入适量水溶解,然后混匀,最后加入水定容至刻度线
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A.
5.0×10-5
B.
2.0×10-4
C.
1.0×10-4
D.
4.0 ×10-4
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A.
正确
B.
错误
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A.
5%
B.
10 -3
C.
10 -8
D.
10 -7
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A.
30.He added, 'President Obama is going to do_____ he thinks is necessary to get our economy moving again.' A.everything what
B.
no matter what
C.
whichever
D.
whatever
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A.
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B.
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C.
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D.
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【单选题】某一元弱酸的浓度为0.01mol·L-1,298K时离解度为1%,该一元弱酸的Kθa
A.
10-2
B.
10-4
C.
10-8
D.
10-6
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A.
pH < 5.0
B.
5.0 < pH < 7.0
C.
4.0 < pH < 6.0
D.
pH > 7.0
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