問題詳情

Times, as we understand and measure it, is a human invention. The science of studying time, as well as the art ofmaking instruments that measure time, is known as horology. Different instruments have been used to keep track oftime over the years, in an effort to count time in equal units. Sundials, or sun clocks, were used as early as 3500 B.C.and divided daylight time into equal hours. In Europe, in the fourteenth century, the hourglass was used. Time wasthen measured by having a quantity of sand, water, or mercury run from the upper to the lower part over a set period oftime. The first spring-powered clock was invented in Germany around 1510. The power for this clock came from ametal coil inside called a mainspring. To operate the clock, a person would wind the mainspring by turning a key.Battery-powered clocks were first used in the 1840s, with electric and quartz-powered clocks coming into use in theearly 1900s.With the invention of battery and electric-powered clocks, there was no longer the need to wind amainspring. As a result, time-keeping became much more accurate.
16. The passage above is about .
(A) the importance of being always on time
(B) the significance of making time-keeping instruments
(C) the evolution of humans’ ideas of time.
(D) the development of horology.

參考答案

答案:D
難度:適中0.451923
統計:A(3),B(29),C(23),D(47),E(0) #
個人:尚未作答書單:介係詞

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