问题 问答题

触电事故是当通过人体或动物的电流达到一定值时,对人体或动物造成伤害甚至身亡的现象.如图电路一旦接通时,卡通画中左右两只鸟,哪只鸟有触电危险?哪只鸟相对安全?请分别说明理由.

答案

左边鸟有触电危险,右边鸟相对安全.

因为左边鸟与灯泡并联,电路一旦接通,其两端电压为220V,通过的电流较大,故有触电危险;

右边鸟与导线并联,被导线短路,两脚之间的电流较小,故相对安全.

单项选择题

Of all the changes that have taken place in English-language newspapers during the past quarter-century, perhaps the most far-reaching has been the inexorable decline in the scope and seriousness of their arts coverage.

It is difficult to the point of impossibility for the average reader under the age of forty to imagine a time when high-quality arts criticism could be found in most big-city newspapers. Yet a considerable number of the most significant collections of criticism published in the 20th century consisted in large part of newspaper reviews. To read such books today is to marvel at the fact that their learned contents were once deemed suitable for publication in general-circulation dailies.

We are even farther removed from the unfocused newspaper reviews published in England between the turn of the 20th century and the eve of World War 2, at a time when newsprint was dirt-cheap and stylish arts criticism was considered an ornament to the Publications in which it appeared. In those far-off days, it was taken for granted that the critics of major papers would write in detail and at length about the events they covered. Theirs was a serious business, and even those reviews who wore their learning lightly, like George Bernard Shaw and Ernest Newman, could be trusted to know what they were about. These men believed in journalism as a calling, and were proud to be published in the daily press. "So few authors have brains enough or literary gift enough to keep their own end up in journalism," Newman wrote, "that I am tempted to define ’journalism’ as ’a term of contempt applied by writers who are not read to writers who are’."

Unfortunately, these critics are virtually forgotten. Neville Cardus, who wrote for the Manchester Guardian from 1917 until shortly before his death in 1975, is now known solely as a writer of essays on the game of cricket. During his lifetime, though, he was also one of England’s foremost classical-music critics, and a stylist so widely admired that his Autobiography (1947) became a best-seller. He was knighted in 1967, the first music critic to be so honored. Yet only one of his books is now in print, and his vast body of writings on music is unknown save to specialists.

Is there any chance that Cardus’s criticism will enjoy a revival The prospect seems remote. Journalistic tastes had changed long before his death, and postmodern readers have little use for the richly upholstered Vicwardian prose in which he specialized. Moreover, the amateur tradition in music criticism has been in headlong retreat.

Which of the following would shaw and Newman most probably agree on()

A. It is writers’ duty to fulfill journalistic goals

B. It is contemptible for writers to be journalists

C. Writers are likely to be tempted into journalism

D. Not all writers are capable of journalistic writing

单项选择题