题目内容
SECTION B PASSAGES
Directions: In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow.
听力原文： What makes it rain.9 Rain falls from clouds for the same reason anything falls to Earth. The Earth's gravity pulls it. But every cloud is made of water droplets or ice crystals. Why doesn't rain or snow fall constantly from all clouds？ The droplets or ice crystals in clouds are exceedingly small. The effect of gravity on them is minute. Air currents move and lift droplets so that the net downward displacement is zero, even though the droplets are in constant motion.
Droplets and ice crystals behave somewhat like dust in the air made visible in a shaft of sunlight. To the casual observer, dust seems to act in a totally random fashion, moving about chaotically without fixed direction. But in fact dust particles are much larger than water droplets and they finally fall. The cloud droplet of average size is only 1/2500 inch in diameter. It is so small that it would take sixteen hours to fall a mile in perfectly still air, and it does not fall out of moving air at all. Only when the droplet grows to a diameter of 1/125 inch or larger can it fall from the cloud. The average raindrop contains a million times as much water as a tiny cloud droplet. The growth of a cloud droplet to a size large enough to fall out is the cause of rain and other forms of precipitation. This important growth process is called "coalescence".
What is the main topic of the passage？
查看答案
搜索结果不匹配？点我反馈
更多问题
SECTION A CONVERSATIONS
Directions: In this section you will hear several conversations. Listen to the conversations carefully and then answer the questions that follow.
听力原文：F: Mr. Franklin, in recent years, Nigeria's traffickers have become key players in the global narcotics trade. Could you use a case to show how they carry on their business？
M: In June 1996, our investigator began tapping four telephone lines in the Chicago area, the taps revealed that a clothes shop run by an Nigerian women, Karl, was actually a front for a worldwide drug ring, bringing heroin from Thailand and Cambodia to the United States. The drug was resold from the clothes shop to Nigerian wholesalers in a trade worth an estimated value of $120 million a year.
F: When was she arrested？
M: On an autumn day in 1996, law enforcement officers in Chicago arrested Kafi and 20 other Nigerians. The same day, in coordinated raids in New York, Detroit, London, Paris, Amsterdam and Bangkok, police seized a dozen more people linked with the drug ring. Eventually, 27 people, most Nigerians, were indicted.
F: What was the court's decision？
M: In August1998, Karl was sentenced to 117 moths in custody for conspiring to import and possess with intent to distribute heroin. But as a matter of fact, that gang was just the tip of an iceberg.
F: Is there any statistics？
M: Today, Nigerian organized criminals are active in no fewer than 60 countries. In the past five years they have been implicated in over 1,200 narcotics smuggling cases, involving several hundred kilos of heroin and cocaine.
F: How do these Nigerians successfully smuggle cocaine for so many times？
M: Well, Customs officers call them "stuffers and swallowers" because, typically, Nigerian smugglers ingest or insert into body cavities between 60 and 70 rubber condoms, each containing around ten grams of heroin or cocaine.
What did Karl the criminal mentioned in the case have as her front of the drug ring？
在备抵法下，企业将不能收回的应收账款确认为坏账损失时，应计入资产减值准备，并冲销相应的应收账款。 ()
When we want to (56) other people what we think, we can do it not only with the help of words, but also in many (57) ways. For example, we sometimes move our heads (58) when we want to say "yes", and we move our heads (59) when we want to say "no".
People who can (60) hear (60) speak talk to each other with the help of their fingers. People who do not understand each other's language have to do the same. The following story shows (61) they sometimes do it.
(62) English man who could not speak Italian was (63) travelling in Italy. One day he entered a restaurant and sat (64) a table. When the waiter came, the Englishman opened his mouth, (65) his fingers into it, (66) them out again and moved his lip. In this way he meant to say," (67) me something to eat. "The waiter soon brought him (68) tea. The Englishman (69) his head and the waiter understood that he didn't want tea, so he took it (70) and brought him (71) coffee. The Englishman was angry. He was just going to leave the restaurant (72) another traveller came in. When this man saw the waiter, he (73) his hands on his stomach. That was enough. In a (74) minutes there was a large plate of bread and meat (75) his table.
(71)
In what now seems like the prehistoric times of computer history, the early post-war era (战后时期), there was a quite widespread concern that computers would take over the world from man one day. Already today, less than forty years later, as computers are relieving us of more and more of the routine tasks in business and in our personal lives, we are facing with a less dramatic but also less foreseen problem. People tend to be over-trusting (过分信任) of computers and are reluctant to challenge their authority. Indeed, they behave as if they were hardly aware that wrong buttons may be pushed, or that a computer may simply malfunction(失灵).
Obviously, there would be no point in investing(投入) in a computer if you had to check all its answers, but people should also rely on their own internal computers and check the machine when they have the feeling that something has gone wrong. Questioning and routine double checks must continue to be as much a part of good business as they were in pre-computer days. Maybe each computer should come with the following warning: for all the help this computer may provide, it should not be seen as a substitute for fundamental thinking and reasoning skills.
What is the main purpose of this passage？
微信支付 
支付宝支付