已知a,b∈R,那么“log12a>log12b”是“a<b”的( ) A.充分不

题型:选择题

问题:

已知a,b∈R,那么“log
1
2
a>log
1
2
b
”是“a<b”的(  )
A.充分不必要条件B.必要不充分条件
C.充要条件D.既不充分也不必要条件
考点:充分条件与必要条件
题型:选择题

出口票据贴现产品规定跟单托收项下汇票须经开证行()。

A.承兑

B.保付加签

C.保兑

D.贴现

题型:选择题

阅读理解

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

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 learn 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.

7:00-9:50 pm. Joseph Saimders is 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, Wends. 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 week-days 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 the 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

题型:选择题

科学研究的目的是发现事物的本质,总结事物的发展规律,______反映科学研究成果的学术论文应该记载新的发现和新的结论,______使人们获得新的知识。
依次填入划横线部分最恰当的一项是( )。

A.而 最终
B.所以 从而
C.但是 而且
D.因此 并且

题型:选择题

焦炭塔上头盖应注意什么?

题型:选择题

下列说法正确的是()。

A.执行价格与标的物价格的相对差额决定了内涵价值的有无及其大小

B.就看涨期权而言,标的物市场价格超过执行价格越多,内涵价值越大

C.当标的物市场价格等于或低于执行价格时,内涵价值为零

D.就看涨期权而言,标的物市场价格低于执行价格越多,内涵价值越大

更多题库