题型:选择题 I was told that there were about 50 foreign students ____ Chinese in the school, most ____ were from Germany.A. study; of whom B. study; of them C. studying; of them D. studying; of whom 查看答案
题型:单项选择题 ()is not a factor which will affect the accuracy of GPS receiver.A.detective AvailabilityB.local environmental conditionsC.autonomous mode versus differential correction mode versus RTCM modeD.the averaging of recorded locations 查看答案