One assumption of bounded rationality is that managers can analyze all relevant information about all alternatives for a situation.

Feelings of love may wax and wane during a relationship, but trust is constant. Infidelity is the most devastating betrayal of trust a couple can experience. That survey found that when one partner had sex outside the relationship, the couple were more likely to break up. Even a little bit of infidelity can set forces in motion that eventually wrech a marriage. Only when we trust our lover to be faithful and know that he or she can trust us do we fell comfortable and at peace with our own conduct and our relationship.

The TCP protocolis a (71) layer protocol. Each connection connects two TCPs that may be just one physical network apart or located on opposite sides ofthe globe. In other words, each connection creates a (72) witha length that may be totally different from another path created by another connection. This means that TCP cannot use the same retransmission time for all connections. Selecting afixed retransnussion time for all connections can result in serious consequences. Ifthe retransmission time does not allow enough time for a (73) to reach the destination and an acknowledgment to reach the source, it can result in retransmission of segments that are still on the way. Conversely, if the retransnussion time is longer than necessary for a short path, it may result in delay for the application programs.Even for one single connection, the retransmission time should not be fixed.A connection may be able to send segments and receive (74)faster during nontraffic period than during congested periods. TCP uses the dynamic retransmission time,a transmission time is different for each connection and which may be changed during the same connection. Retransmission time can be made(75) by basing it on the round-trip time (RTT). Several formulas are used for this purpose.

A.physical

B.network

C.transport

D.application@@@SXB@@@A.path

B.window

C.response

D.process@@@SXB@@@A.process

B.segment

C.program

D.user@@@SXB@@@A.connections

B.requests

C.acknowledgments

D.datagrams@@@SXB@@@A.long

B.short

C.fixed

D.dynamic

One of the wrong notions about science is that many scientific discoveries have come about____.

A．accordingly

B．accidentally

C．artificially

D．additionally

One of the main reasons for air pollution is that many cars emit smoke into the at-mosphere.

A．disregard

B．discharge

C．disdain

D．dismay

One recent decision made by Americas National Science Foundation may change the unfavorable situation for females in academic promotion because______.

A．it allocates more funds to the research field predominated by females

B．it radically changes the academic promotion mechanism in universities

C．it eases the restrictions on the age of candidates applying for senior posts

D．it allows researchers to finish the project on a more flexible schedule

Section B

Directions: This section is to test your ability to understand short conversations. There are 2 recorded conversations in it. After each conversation, there are some recorded questions. The conversations and the questions will be spoken only once. When you hear a question, you should choose the correct answer from the 4 choices marked A, B, C, and D.

听力原文：M: We want to take a train to New York.

W: Regular or express train?

M: How much time would I save if we took the express?

W: About one hour. The next express train arrives in New York at 3:15.

M: And how much more do i have to pay for the express?

W: First class is 24 dollars more, and second class is 15 dollars more.

M: As long as we can arrive one hour earlier, I don't mind paying a little extra. Then give me one second class ticket on the express, please.

W: OK, one second class ticket. Here you are.

M: Thank you.

Q6. How much more does the man have to pay for the first class express?

7.What kind of ticket has the man bought?

(6)

A．24 dollars.

B．15 dollars.

C．20 dollars.

D．25 dollars.