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【判断题】
超临界流体萃取技术常用作超临界流体的物质是一氧化碳A.
正确
B.
错误
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举一反三
【单选题】When the Cold War began, who was the president of U.S.A?
A.
Roosevelt
B.
Acheson
C.
Eisenhower
D.
Truman
【单选题】Who began to call the days in a week after five planets, the sun and the moon?
A.
The Egyptians.
B.
The Romans.
C.
The Babylonians.
D.
The Anglo - Saxons.
【单选题】Yue Yue, ________ 2yearold girl who was hit, began to slip into ________ worse state on Tuesday night. [ ]
A.
the; the
B.
a; a
C.
a; the
D.
the; a
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