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A.Among
B.Either
C.Neither
D.Both
A.28
B.29
C.30
D.31
A．some of which
B．which
C．each of which
D．that
A.Series和DataFrame之间不能进行运算
B.DataFrame表示带索引的二维数据
C.Series表示带索引的一维数据
D.可以像对待单一数据一样对待Series和DataFrame对象
Linda: The TV series we saw yesterday was wonderful. I like it so much!
David: ______. It's very entertaining. I feel like watching it again.
A.background
B.exploration
C.survey
D.outlook
What was found in "the Council Room"？
A．A small natural opening.
B．A large cave.
C．Another series of rooms.
D．Many old Indian objects.
What is the main reason for dollar's weakness？
A．A series worse-than-expected data were released.
B．German Bundesbank was reluctant to cut rate.
C．Technical factors.
D．All of the above.
Usually the borrowing firm of term loans promises to repay ______.
A．the principal and interest until the end of the loan period
B．the principal and interest at the end of the loan period
C．the loan in a series of installments
D．at any time when cash is more abundant ______.
