B Because the newdevice can be sunk into boreholes or fixed above ground.
C Because thecommon methods .can cause false alarms.
D Because the common methods areuseless.
44. Which of the following statements is NOT true of the device,according to Paragraph 4?
A It is filled in with gravel.
B It consistsof a steel pipe.
C It is dropped into a borehole filled in withgravel.
D It is connected to a sensor on the surface.
45. According tothe context, what does the word positives in the fifth paragraph mean?
APositive electric charges.
B Evidences.
C Warnings.
DPredictions.
【2014年职称英语理工类B级阅读理解精华练习(12)】相关文章:
最新
2016-03-01
2016-03-01
2016-03-01
2016-03-01
2016-03-01
2016-03-01