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【判断题】
( )在没有系统误差的前提条件下,总体平均值就是真实值。A.
正确
B.
错误
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举一反三
【单选题】Though ________ in a big city, Bill always prefers to sing the songs of country life.
A.
bringing up
B.
grown
C.
raised
D.
Keeping
【单选题】Though________up in a big city,Bill always prefers to live a country life. [ ]
A.
brought
B.
was brought
C.
bringing
D.
having brought
【简答题】鞭毛是细菌的运动器官,下列哪种方法可用来判断细菌是否有鞭毛( )。(5.0分)A. 拴菌实验 B. 鞭毛染色 C. 半固体穿刺培养 D. 以上都是
【简答题】鞭毛是细菌的运动器官,下列哪种方法可用来判断细菌是否有鞭毛( )。A. 拴菌实验 B. 鞭毛染色 C. 半固体穿刺培养 D. 以上都是
【判断题】Bill Katz prefers more of good 1 to less and he prefers less of good 2 to more. Bill has convex preferences. If we draw his indifference curves with good 1 on the horizontal axis and good 2 on the ver...
A.
正确
B.
错误
【单选题】______ for several times, Bill made up his mind not to play computer games at night any more.
A.
To be scolded
B.
To have been scolded
C.
Being scolded
D.
Having been scolded
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