47. The warnings from electronic road signsare not working as well as expected because people usually ________.
45. The in-car computer system, whichNikolaos Georgis has filed for a US patent, provides a nationwide database of ________.
49. The speculatior raised by Pertti Peussais based on a function of the in-car computer that prevents the car exceedingcertain speeds when ________.
50. Laser is not regarded as the bestoption of detecting surface conditions for it always fails to detect ice under thecondition of ________.
51. What could be the obstacle to theultimate aim of designing friction sensors?

　　以上是《2016英语六级阅读理解模拟试题（十）》的详细内容。

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