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问题 填空题

已知数据-5，-1，1，-4，x，16的中位数是-1，则x=______，众数是______，平均数是______．

答案

将除x外的5个数从小到大排列为：-5，-4，-1，1，16．

加入x后，有6个数，中位数即第3、4位平均数是-1，故x应为第3个或第4个，且与-1的平均数是-1，故x=-1；

众数是出现次数最多的数，即-1；

平均数为

-5-1+1-4+-1+16
6
=1．

故填-1，-1，1．

单项选择题

纳税人、扣缴义务人、纳税担保人同税务机关在纳税上发生争议时，可以在收到缴款凭证后( )日内，向上一级税务机关申请复议。

A．15

B．30

C．60

D．45
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单项选择题

One of the most convenient and cheapest ways to see America is by riding a Greyhound bus. This interstate bus system connects all major cities in the United States, (52) people with frequent and convenient service. The bus system even has an international service (53) makes connection with cities in Canada and Mexico.

Its network even extends to some of the smaller towns and out-of-the-way communities (54) the great interior of the country. Traveling by bus may (55) longer than flying by plane, but the terminals are located in the center of most cities and there is (56) to the downtown area. These buses are comfortable and air-conditioned. They are all equipped with toilets in the rear to (57) the convenience of the passengers, but there are some very severe (58) of conduct which are strictly enforced. On all buses (59) is forbidden and the consumption of alcoholic drinks is not allowed.

(60) bus travel may not be suited to everyone’s taste, it affords budget travelers the (61) to see America in comfort and safety and at a leisurely unhurried pace.

61().

A.money 

B.chance 

C.time 

D.occasion
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