病害发生的三角关系

题型:名词解释

问题:

病害发生的三角关系

考点:森林病理学森林病理学题库
题型:名词解释

求经过直线3x-2y+1=0和x+3y+4=0的交点,且垂直于直线x+3y+4=0的直线l的方程.

题型:名词解释

一天,某村村民一大早就来到投票站,第一次参加对村民委员会主任的投票。此前,3名候选人已经进行了13场演讲和答辩,面对面地回答了村民提出的160多个问题。这种选举方式(    )

①使每个选民都有表达自己意愿的机会,选出自己心目中最值得信赖的当家人

②在选民较多、分布较广的情况下使用

③充分考虑当选者结构的合理性

④为选民行使选举权提供了选择的余地

⑤在被选举人之间形成了相应的竞争 

A.①④⑤

B.②③④

C.③④⑤

D.①②③

题型:名词解释

Declan Mayes, President of the Music Buyers Association, is furious at a recent announcement by the recording industry regarding people downloading MP3 music files from the Internet as actual criminals.
A few parallels may be instructive. If someone copies an audio music cassette for their own private use, they are, strictly speaking, breaking the law. But recording companies have usually turned a blind eye to this practice because prosecuting the few people involved would be difficult, and the financial loss to the company itself is not considered significant. Now the Music Recording Association has announced that it regards individuals downloading music from the Internet as pirates, claiming that they damage the industry in just the same way. "The industry is completely overreaching; it’ll be a laughing stock," says Mayes. "They’re going to arrest some teenager downloading files in his bedroom and sue him for thousands of dollars! This isn’t going to frighten anyone into buying CDs".
Mayes may have a point. There is a general consensus that CD pirates should be subjected to the full wrath of the law, but few would see an individual downloading music for his or her own pleasure in the same light. However, downloading music files illegally is not as innocuous as making private copies of audio cassettes. The scratchy, distorted cassette copy is a poor version of the original recording, whereas an MP3 file is of high quality and can be stored on a CD, for example. It is this that makes the practice a powerful temptation for music fans, given the high cost of CDs.
What does Mayes think about claims that music companies could be forced out of business by people downloading music illegally That’s nonsense. Music companies are always whining about high costs, but that doesn’t prevent them from recording hundreds of CDs by completely unknown artists, many of whom are "packaged" by marketing departments to appeal to young consumers. The companies are simply hoping that one of these new bands or singers will be a hit, and although it can be expensive to promote new artists, the cost of manufacturing the CDs is actually very low.
This last point would appear to be the focus of resentment against music companies, a CD is far cheaper to produce than its price in the shops would indicate, and profit margins for the music companies are huge. An adult with a reasonable income may not object to paying £15 for a CD of classical music, but a teenager buying a CD by the latest pop sensation may find that price rather steep — especially since the latest pop sensation is almost certain to be forgotten within a few months. And while the recording industry can’t be held responsible for the evanescent nature of fame, given the teenage appetite for anything novel, it could lower the prices it charges — especially since technology is making CDs even cheaper to produce.
This is what Mayes hopes will happen. If the music industry stops exploiting the music-buying public, it can survive. Everyone would rather buy a CD, with an attractive jacket and booklet, than mess around downloading files, but the price has to be reasonable. The problem isn’t going to vanish if the industry carries on trying to make a quick profit. Technology has caught up with the music companies, and trying to fight it by taking people to court will only earn money for the lawyers.

The author points out that the music industry cannot be blamed for ______.

A.(A) the fact that fewer teenagers are buying classical music CDs

B.(B) the fact that fashions change quickly

C.(C) the poor quality of modern music

D.(D) the prices that are charged for CDs in shops

题型:名词解释

( )指消费者在某特定时期内和一定市场上,按某一价格愿意并且能够购买的某种商品或劳务的数量。

A.产量

B.供给

C.需求

D.以上均不是

题型:名词解释

下图为我国沿26°N1月平均气温曲线图。读图回答以下问题。

⑤地比④地气温高的原因是()

A.⑤地海拔低,气温高

B.⑤地受暖气团控制的时间长

C.⑤地受副热带高气压控制,晴天多

D.⑤地降水多,大气的保温效应好

更多题库