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【单选题】
The referee ________ a coin to decide which team should kick off.A.
throw
B.
threw
C.
toss
D.
tossed
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【简答题】机器零件在 三个方向上,每个方向至少有一个尺寸基准。
【简答题】What is the difference between e-business and e-commerce?
【单选题】What is the difference between buying e-books and other products?
A.
E-book will be delivered to you by post.
B.
You have to buy e-book in the bookstore.
C.
E-book is obtained by downloading the pages.
D.
E-book can be paid after reading
【单选题】A researcher is interested in testing to determine if the mean of population one is greater than the mean of population two. The null hypothesis is that there is no difference in the population means ...
A.
1.323
B.
1.721
C.
1.717
D.
1.321
【简答题】2) What is the difference between e-business and e-commerce?
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