题目内容
（请给出正确答案）
A.P(A|B)=4/7
B.P(B|A)=4/15
C.P(A|B)=7/15
D.P(B|A)=7/25
E.P(A|B)=3/7
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更多“听力原文：P（A|B)＝P（AB)/P（B)＝4/7。P（B…”相关的问题
设A、B、C为事件，P(ABC)＞0，如果P(AB|C)＝P(A|C)P(B|C)，则（） (A)P(C|AB)＝P(C|A)． (B)P(C|AB)＝P(C|B)． (C)P(B|AC)＝P(B|A)． (D)P(B|AC)＝P(B|C)．
Section B
Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D.
听力原文： Do you have a tough math test coming up？ Then listen to some classical piano music just before the test. You might come up with a higher score. Researchers at a university in California conducted an experiment. They asked a group of college students to listen to some piano music by a famous 18th century composer before taking a math test. They were surprised to find that the students' scores jumped 8 to 9 points. The music seems to excite nerve activities in the brain; similar to the activity that occurs when a person is figuring out a math problem. However, the scientists warn before you get too excited about applying this method to your math test, you should remember that brain exciting effects last only 10 or 15 minutes. Would rock music work as well as the piano music did？ No, the scientists say. In fact, the less complex music might even interfere with the brain's reasoning ability.
(27)
A．The difference between classical music and rock music.
B．Why classical music is popular with math students.
C．The effects of music on the results of math tests.
D．How to improve your reasoning ability.
Section B
Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D.
听力原文： Do you know how to advertise for a bank？ If you ask people about the functions of a bank, they would probably say that the bank is where you can deposit money and cash a check. But it's much more than these. And we have to tell people this in our advertisement.
There are several things to think about for a bank advertisement. (26)The first problem is to decide who should be our audience. Should our advertisement be aimed at adults with full employment only？ Or should it also appeal to students, housewives, retired workers, or even children？ It is a good idea to address the largest possible audience. If we introduce the name of our bank to children they will never forget it.
The next question is how to attract people of different social groups to our bank. The usual tip is to offer free gifts, for example, portable radios or T-shirts for the young and gold pens for business executives. That always works. But what do we give to our best customers？ That's another question. What about leather diaries, for example？
Banks are very competitive. We have to think of something new to offer our customers. That's the third problem. Ours is one of the first banks to have drive-in service and to open on Saturdays, but now many banks do. Most banks also offer a variety of checking and saving accounts and a full range of investment plans to suit the needs of their customers, as well as the 24-hour ATM banking which makes it much faster and easier for customers to withdraw cash or do other things. (27)To attract more customers to our bank, it is essential that we have something that no other bank offers.
(27)
A．Business executives, housewives and college students.
B．Parents planning for their children's education.
C．Adults with or without full employment, students, housewives, and retired people.
D．Best customers only.
A.P↑．next：＝P；
B.P↑．next：＝P↑．next↑．next；
C.P：＝P↑．next；
D.P↑．next↑．next：＝P↑．next；
设A、B为两个相互独立的事件P(A∪B)=0.6，P(A)=0.4，则P(B)等于()。
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A.*p表示的是指针变量p的地址
B.*p表示的是变量a的值,而不是变量a的地址
C.*p表示的是指针变量p的值
D.*p只能用来说明p是一个指针变量
#include＜stdio．h＞
void swap(int *P，int *q)
{
int t；
t=*P；*P=*q；*q=t；
}
main()
{int a=10，b=20；swap(＆a，＆b)；
printff"%d%d\n"，a，b)；
}
.jpg)
