tpo29阅读及答案解析

　　tpo29阅读试题

　　A.known.

　　B.depended on.

　　C.recognized.

　　D.utilized.

　　2.In paragraph 1, uncertainty is expressed about all of the following aspects of the early development of waterpower EXCEPT

　　A.when exactly the very first waterpower devices were invented.

　　B.when exactly the very first waterpower devices were developed.

　　C.whether water was one of the earliest sources of power to be used by humans.

　　D.whether the very earliest waterpower devices arose independently.

　　3.According to paragraph 2, what was true of the waterpower mills built throughout the Roman Empire?

　　A.Most had horizontal-axis wheels.

　　B.Their design was based on mills that had long been used in Scandinavia.

　　C.Their design was more popular beyond the Empire's boundaries than it was within the Empire.

　　D.They are more advanced than the mills used in the Middle East at an earlier time.

　　4.The phrase "the application of waterpower" in the passage (paragraph 3)is closest in meaning to

　　A.the uses to which waterpower was put.

　　B.the improvement made to waterpower.

　　C.the method by which waterpower was supplied.

　　D.the source of waterpower available.

　　5.According to paragraph 4, which of the following was discovered as a result of scientific and technical investigations of waterpower conducted between 1650 and 1800?

　　A.Some types of small waterwheel can produce as much horsepower as the very largest wheels.

　　B.Waterwheels operate more efficiently when water falls away from their blades slowly than when water falls away quickly.

　　C.Waterwheel efficiency can be improved by increasing the amount of kinetic energy water contains as it passes over a waterwheel's blades.

　　D.Unlike other types of waterwheels, the overshot wheel is capable of producing more than 60 horsepower units of energy.

　　6.The word "pessimistic" in the passage is closest in meaning to

　　A.negative.

　　B.unlikely.

　　C.surprising.

　　D.incomplete.

　　7.The term "by then" in the passage refers to

　　A.by the time steam power entered the scene.

　　B.by the year 1800.C.by the year 1900.D.by the time waterwheel was becoming obsolete.

　　8.According to paragraph 5, why did waterpower become more importantly by 1900?

　　A.Better waterwheel designs improved the efficiency of waterpower.

　　B.Waterpower was needed to operate steam engines.

　　C.Waterpower was used to generate electricity.

　　D.Waterwheels became more efficient than coal-powered engines.

　　9.Which of the sentences below best expresses the essential information in the highlighted sentence in the passage paragraph 5? Incorrect choices change the meaning in important ways or leave out essential information.

　　A.The growth of the electric-power industry stimulated significant changes in hydro technology and scientific progress in electrotechnology in the nineteenth century.

　　B.The changes in hydro technology that led to the growth of the electric-power industry also led to discoveries and developments in electrotechnology in the nineteenth century.

　　C.Advances in electrotechnology in the nineteenth century and changes in hydro technology were responsible for the growth of the electric-power industry.

　　D.In the nineteenth century, the scientific study of electrotechnology and hydro technology