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问题 选择题
要得到函数y=2tan(2x+
π
4
)的图象，需要将函数y=2tan（2x）的图象（　　）
A．向左平移
π
4
个单位		B．向右平移
π
4
个单位
C．向左平移
π
8
个单位		D．向右平移
π
8
个单位
答案

由于y=2tan(2x+

π
4
)=2tan2（x+
π
8
），

故将函数y=2tan（2x）的图象向左平移

π
8
个单位，可得函数y=2tan2（x+
π
8
）=2tan（2x+
π
4
）的图象，

故选C．

单项选择题

Society can be broken up into three classes: the Elite, the Meek and the Masses. The Elite are (51) of the top 10% of society, those that don’t need anyone’s help (52) it comes to getting what they want. They have the status, the money, the power, and the respect to (53) whatever they need. In spite of the fact that they enjoy the upper hand, people outside of this class will still go to great (54) to help them even further.

The Meek are comprised of the bottom 10% of society, those who need our help, and badly at that. But (55) so many of us are eager to get in well with the Elite, few actually care enough to provide any (56) to the Meek. The Masses are the largest class, (57) up the middle 80% between the Meek and the Elite. Most of the Masses could use some help getting by, and (58) it would usually improve their lives considerably, but they (59) get it. Why do most people would rather help the Meek or the Elite Because they are (60) with instant gratification or the anticipation of future benefits. We rarely help the Masses because there is nothing really in it for us, and this shows humanity’s true colors.

55().

A.whereas 

B.however 

C.nevertheless 

D.since
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填空题

“三言”和“二拍”，代表了（）的最高成就。
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