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【简答题】
Jim often gets up e__________ to catch the early bus.
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【判断题】There is a very famous saying. Fashion is in Europe, living is in China , but eating is in America.
A.
正确
B.
错误
【简答题】阅读理解题,阅读短文,判断正误。 In many parts of China, spring is very short. It is usually warm and dry, and the wind is very strong. Summer is often very hot with a lot of rain. Everything in nature is green. It i...
【单选题】总体平均数和样本平均数之间的关系是( )。
A.
总体平均数是确定值，样本平均数是随机变量
B.
总体平均数是随机变量，样本平均数是确定值
C.
两者都是随机变量
D.
两者都是确定值
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