問題詳情

People have always searched the sky for clues about upcoming weather. Throughout the ages,farmers and sailors have looked to the winds and clouds for signs of approaching storms. But noreal understanding of the weather could be achieved without a scientific study of the atmosphere.Such a study depends on being able to measure certain conditions, including pressure, temperature,and moisture levels.A true scientific examination of weather, therefore, was not possible until the development ofaccurate measuring instruments, beginning in the 17th century. Meteorology — the science ofstudying the atmosphere — was born in 1643 with the invention of the barometer, which measuresatmospheric pressure. The liquid-in-glass thermometer, the hydrometer to measure humidity — theamount of moisture in the air — and the weather map also were invented during the 1600s.With the measurement of these basic elements, scientists began to work out the relationshipsbetween these and other atmospheric conditions, such as wind, clouds, and rainfall. Still, theirobservations failed to show an overall picture of the weather. Such complete weather reporting hadto wait two centuries for the rapid transfer of information made possible by the invention of thetelegraph during the 1840s.
46. The passage is mainly concerned with the _______________.
(A) weather
(B) thermometer
(C) storms
(D) telegraph

參考答案

答案：A
難度：簡單0.736842
統計：A(42),B(5),C(2),D(6),E(0)

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