67. What is the primary benefit of using smart phones with embedded inertial sensors?
A. They require new equipment, such as RFID technologies.
B. They can track pedestrian movement indoors with GPS.
C. No additional infrastructure would be needed.
D. No additional money would be spent.
68. What can we know from the third paragraph?
A. pedestrians indoors cannot be positioned using GPS.
B. GPS can be used to locate pedestrians indoors.
C. Smart phones with embedded inertial sensors can save a lot of energy.
D. The current GPS system is perfect in many ways.
69. We can learn from the passage that the recent studies of smart phones
.
A. were conducted by Shahid Ayub alone
B. were supported by GPS
C. have no connection with everyday needs
D. can be applied to underground tube stations
70. What would be the best title for the text?
A. Tracking Pedestrians Indoors Using Their Smart Phones
B. GPS Found to Have Defects
C. Additional Infrastructure Should Be Constructed in Airports
D. People Need to Replace Their Current Smart Phones
试卷答案
1.BBBA
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