已知数列{an}的前n项和Sn=an-1(a是不为零的常数)，那么数列{an}[

发布时间：2017-04-29 19:14 │ 来源：www.tikuol.com

题型：选择题

问题：

已知数列{a_n}的前n项和S_n=aⁿ-1(a是不为零的常数)，那么数列{a_n}[ ]

A．一定是等差数列

B．一定是等比数列

C．或者是等差数列，或者是等比数列

D．既不可能是等差数列，也不可能是等比数列

考点：等差数列的定义及性质等比数列的定义及性质

题型：选择题

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A: Hi, Joanna. __1__.
B: I want to go to a movie. Do you want to go with me?
A: That sounds good. __2__.
B: I want to watch The Wheat. Come with me!
A: The Wheat? It's a wonderful movie, but I have seen (看过) it.
B: What a pity! What do you want to do then?
A: __3__ They have some new animal.
B: Really?
A: Yes. __4__. I want to go there to have a look.
B: Wonderful! __5__. Pandas are my favorite animals.

A. Two young pandas are in the zoo now.
B. What movie do you want to watch?
C. How do you go to the zoo?
D. Where do you want to go?
E. Let's go together!
F. I want to go to the zoo.
G. You are welcome.

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A.术后痛

B.椎间盘病变腰痛

C.心绞痛

D.分娩痛

E.创伤后痛

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A.ADP

B.CDP

C.GDP

D.UDP

E.TDP

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