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问题 填空题

已知函数ƒ（2x）的定义域为[-1，1]，则函数y=ƒ（log2x）的定义域为______．

答案

∵函数ƒ（2x）的定义域为[-1，1]，

∴-1≤x≤1，

∴

1
2
≤2x≤2．

∴在函数y=ƒ（log2x）中，

1
2
≤log2x≤2，

∴

2
≤x≤4．

故答案为：[

2
，4]．

单项选择题

Questions 6 to 10 are based on the following passage: (10 分)In previous generations, young people were under their parents’ control; now the teenagechildren of the West’s richest generation were ready for something to get excited about. The Beatlessimply put a spark to a fuse (导火线) that was waiting to be lit.Everything changed, and what changed for the Beatles was their lives and their working habits,in the midst of the hysterical (歇斯底里的)following the band attracted.. Because of the demand ofthe fans to see them perform, they played bigger and bigger venues (meeting places), especially inAmerica.But John, Paul, George and Ringo became increasingly unhappy that, because of the screamingof their fans, neither the band nor the audience could hear the music. Creatively frustrated and tiredof the pressures of life under siege (围攻) from their fans, they retired from playing concerts in 1966and decided to concentrate on recording.It was from this point that the brilliance of the Beades really began to reveal itself: they wouldrecord over their career some 200 songs. Never before nor since has any recording and writing groupeven developed and yet remained the same in the way the Beades did. Their songs never lost their universal appeal thanks to the warmth and timelessness of theirmelodies and lyrics.John and Paul were powerful singers with distinctive styles. It became apparent that, despite thefact that the songwriting credits were always equally attributed to them, Paul and John wrote andsang their own songs. George also contributed two or three of his own compositions to each of theBeatles eleven albums. Even Ringo wrote and sang the occasional song.

It is implied in the third paragraph that( )

A．the Beatles had no appetite for fame

B．the audience were unhappy about the sound effect

C．pop musicians get easily fired as they are under great pressures of life

D．the screaming of the fans prevented the Beafles fromperforming happily and creatively
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单项选择题

单双排脚手架拆除作业必须采用（）。

A.由上而下逐层拆除

B.上下同时拆除

C.分段拆除

D.分层拆除
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