问题 解答题
某校在期中质量检测后,对七年级两个班(每班50人)的数学成绩进行评价.下表是这两个班的尖子生、优秀生、及格生的百分率.
百分率

班级

尖子生率(%)

优秀生率(%)

及格生率(%)
一班125292
二班84296
(1)如果85分以上为优秀成绩,那么一班数学成绩的中位数是优秀成绩吗?请说明理由.
(2)学校规定,尖子生率、优秀生率、及格生率按照1:2:7的比确定各班的综合率.请你通过计算说明哪个班的综合率较高?
答案

(1)一班的数学成绩的中位数是优秀成绩.(1分)

理由:因为一班获得优秀成绩的人数为

50×52%=26(人),(2分)

显然第25名、26名的成绩均不低于85分,而中位数是第25名和26名的平均数,

所以中位数是优秀成绩.(4分)

(2)一班的综合率为:

12×1+52×2+92×7
1+2+7
=76(6分)

二班的综合率为:

8×1+42×2+96×7
1+2+7
=76.4(8分)

所以二班的综合率较高.(9分)

阅读理解

阅读理解。

     Eight days for just ¥12,000

     Departs: May-October 2007

     Includes:

     ● Return flights from 6 China's airports to Naples

     ● Return airport to hotel transport

     ● Seven nights' accommodation at the 3-star Hotel Nice

     ● Breakfast

     ● The service of guides

     ● Government taxes

     Join us for a wonderful holiday in one of the Europe's most wonderful-Naples in Italy if you want to

have a nice time in a beautiful small quiet place. The ancient Romans called the city "happy land" with

attractive coastline,colorful towns, splendid views and the warm Mediterranean Sea. Your best choice for

a truly memorable holiday!

     Choose between the peaceful traditional villages of Sant' Agata, set on a hillside six miles away from

Sorrento, or the more lively and well-known international resort town of Sorrento, with wonderful views

over the Bay of Naples.

     Breathtaking scenery, famous sights and European restaurants everywhere. From the mysterious Isle

of Capri to the hunting ruins of Pompeii, and from the unforgettable "Amalfi Drive" to the delightful resorts

of Positano,Sorrento and Ravello, the area is a feast for the eyes! Join us, and you won't be disappointed!

     Price based on two tourists sharing a double room at the Hotel Nice. A single room, another ¥2,000.

A group of ten college students, ¥10,000 for each.

     Like to know more? Telephone Newmarket Air Holidays Ltd on: 0845-226-7788 (All calls charged at

local rates).

1. All the following are included in the price of ¥12,000 EXCEPT _____.

A. transport between the airport and the hotel

B. telephone calls made by tourists

C. the service of guides to tourists

D. double rooms for every two tourists

2. If you don't like sharing a room with others, you have to pay _____.

A. ¥12,000

B. ¥10,000

C. ¥2,000

D. ¥14,000

3. If you like to visit historical sites, which of the following is your best choice?

A. Amalfi.

B. Sant' Agata.

C. Pompeii.

D. Sorrento.

4. Who is the advertisement intended for?

A. Potential tourists.

B. College students.

C. Quiet people.

D. Old people.

单项选择题