题干

某人沿着半径为 R的水平圆周跑道跑了1.75圈,他的(      )

A:路程和位移的大小均为3. 5πR 

B:路程和位移的大小均为R

C:路程为3.5πR、位移的大小为R

D:路程为1.75πR、位移的大小为R

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答案(点此获取答案解析)

C

同类题5

根据短文理解,选择正确答案。

In a Station of the Metro

    The apparition of these faces in the crowd;Petals on a wet, black bough.

    This is the only Ezra Pound poem that many people will read in their lives. Why? One obvious reason is that it's just two lines long. The poem, which can be understood as “A man sees a bunch of faces in the subway and thinks they look like flowers on a tree branch,” is an exercise in shortness. Pound wrote it after having a spiritual experience in a Paris metro (subway) station.

    In 1916, the US poet originally thought he could best describe his vision in a painting. Unfortunately, he wasn't a painter. So he wrote a thirty-line poem, which he didn't like. He dropped the long version in the waste bin. Six months later, he wrote a shorter poem, but didn't like that one either. Finally, a full year after the experience, he had been reading short Japanese poems called haikus, and he figured he would try this style. The result, which was published in 1913, is one of the most famous and influential works in modern poetry.

    This poem is one of the monuments (纪念物) of the 20th-century artistic movement known as “Imagism”. Basically, Pound and his friends thought that images (意象) weren't just decoration: they were the highest form of speech. By finding the right image, the poet can express the true, spiritual reality of a thing, which is more important than using a bunch of adjectives to describe its physical appearance. Thus, “In a Station of the Metro” is a poem that consists of one image expressed with absolute (绝对的) exactness and nothing else.

    To the imagists, the best way to describe an experience is not to use more and more words; the best way is to find exactly the right words. Have you ever told a beloved one that “words can't express” how much you love them? Well, Pound would say that you're just being lazy. In his view, words can express anything, even if it takes an entire year to find the right ones.