“a=1”是“函数f(x)=2x-a2x+a在其定义域上为奇函数”的（） A．充

发布时间：2017-04-15 14:06 │ 来源：www.tikuol.com

题型：选择题

问题：

“a=1”是“函数f(x)=

2x-a

2x+a

在其定义域上为奇函数”的（　　）

A．充分不必要条件	B．必要不充分条件
C．充要条件	D．既不充分也不必要条件

考点：充分条件与必要条件

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患者，男，59岁，全牙列缺失，全口义齿修复。若缓冲区未作缓冲处理，最可能出现的后果是()

A．疼痛

B．义齿翘动

C．义齿咀嚼功能不良

D．义齿纵折

E．恶心

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题型：选择题

完形填空。

This is our classroom. It's not big, but it's very nice. The walls are 1___________ and the desks and chairs
are new. On the wall there is a 2___________ and we can find Beijing, Shanghai and Hangzhou in it. There are
some 3___________ on the teacher's desk. They are for our 4___________, MissGao. She is a good teacher and
we all like her.
I'm on 5___________ today. I come to school early. I help my teacher 6___________ her books, maps
and pictures on her 7___________. I tell her everyone is here. But I'm 8___________. Liu Mei is not at
9___________. I don't know 10___________ she is. But I think she's at home.

( ) 1. A. old
( ) 2. A. map
( ) 3. A. games
( ) 4. A. friend
( ) 5. A. line
( ) 6. A. know
( ) 7. A. desk
( ) 8. A. good
( ) 9. A. there
( ) 10. A. what

B. same
B. clock
B. numbers
B. daughter
B. duty
B. find
B. bike
B. young
B. home
B. which

C. fine
C. kite
C. flowers
C. mother
C. turn
C. put
C. chair
C. right
C. table
C. where

D. white
D. photo
D. lights
D. teacher
D. time
D. give
D. floor
D. wrong
D. school
D. how

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一个外来入侵物种，到达一个新的适宜的环境后[ ]

A．将使原来生态系统的营养结构逐渐变得更加多样化

B．将使原来生态系统中能量流动的传递效率逐渐提高

C．将使原来的生态系统的恢复力稳定性逐渐提高

D．将对原来生态系统中群落的演替产生严重影响

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据原文“自利不渴者”属（）

A.少阴病

B.厥阴病

C.太阴病

D.霍乱

E.以上都不是

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题型：选择题

报纸审判

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