下列各组物质 ① O2和O3 ② H2、D2、T2 ③ 12C和14C ④ CH

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问题:

下列各组物质

① O2和O3 ② H2、D2、T212C和14C ④ CH3CH2CH2CH3 和(CH3)2CHCH3 ⑤乙烷和丁烷⑥ CH3CH2CH2CH(C2H5)CH3 和 CH3CH2CH2CH(CH3)C2H5 根据题意填空(只填序号),

(1)同系物的是_ ;(2)同分异构体的是___。(3)同位素的是__;(4)同素异形体的是___。

考点:同素异形体同位素同分异构体同系物
题型:填空题

代收电信话费时,对我方网点的下列要求正确的有()。

A.需要代收话费的网点可以是任何的网点。

B.需要代收话费的网点的终端可以是做对公也可以是对私的。

C.需要代收话费的网点必须是综合网点

D.需要代收话费的网点的终端必须是能做对公和对私的

E.需要代收话费的网点的柜员必须是免核的综合柜员。

题型:填空题

阅读理解

     Register  (注册)  in person, by phone 264-8833 , or by mail. Use the form given.

     178 IN Winchester St. ,Chicago

     Basic Photography This is an eight-hour course for beginners who want to learn how to use a 35mm

camera. The teacher will cover such  areas  as  kinds of film ,light and lenses  (镜头) . Bring your own

35mm  camera  to  class.  Course  charge :  $50. Jan.  10, 12, 17 , 19, Tues. & Thurs. 6 :00 - 8 :00

p. m. Marianne Adams is a professional photographer whose photographs appear in many magazines.

    Understanding Computers This twelve-hour course is for people who do not know much about

computers, but need to leam about them. You will learn what computers are, what they can and can't

do, and how to use them. Course charge: $75. Equipment charge :  $10. Jan. 14 ,21 ,28 , Sats.

7 : 00 - 9 : 00  pm. Joseph  Saimders is a professor of Computer Science at New Urban University.

He has over twelve years of experience in the computer field.

    Stop Smoking Do you want to stop smoking? Have you already tried to stop and failed? Now it's the

time to stop smoking using the latest methods. You can stop smoking, and this twelve-hour course will

help you  do  it. Course  charge :  $30. Jan. 4, 11, 18 , 25 , Weds. 4 : 00  - 7 : 00  pm  Dr John  Goode  

is  a practicing psychologist  (心理学家) who has helped hundreds of people stop smoking.

     Typing This course on weekdays is for those who want to learn to type,as well as those who want to

improve their typing. You are tested in the first class and practice at one of eight different skill levels. This

allows you to learn at your own speed. Each program lasts 20 hours. Bring your own paper. Course

charge :  $125. Materials charge: $25. Two hours each evening for two weeks. New classes begin every

two weeks. This course is taught by a number of business education teachers who have successfully taught typing courses before.

1. All the courses listed above are offered to people_________.

A. who live in the city of Chicago

B. who are free in the evening

C. who want to take some special courses

D. who like to learn something new

2. Of all the courses mentioned in the passage, the shortest one is_________. 

A. Understanding Computers        

B. Basic Photography

C. Stop Smoking                  

D. Typing

3.  There are typing courses__________.   

A. on Saturdays and Sundays

B. from Monday to Friday

C. from Monday to Saturday

D. on each day in the week

4. From the passage we can infer that___________.    

A. Marianne Adams has had many photographs printed in a magazine

B. Joseph Saimders has worked in New Urban University for 12 years

C. Dr John Goode's methods of stopping smoking are very successful

D. there are eight different skill levels for business education teachers

题型:填空题

质量保修金的比例及金额可由双方约定,但不应超过施工合同价款的( )。

A.1%

B.2%

C.3%

D.5%

题型:填空题

设有二维数组A[0…9][0…19],其每个元素占两个字节,数组按列优先顺序存储,第一个元素的存储地址为100,那么元素A[6,6]的存储地址为______。

题型:填空题

试述牛顿第一、第二、第三定律?

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