A traffic separation zone is that part of a traffic separation scheme which（）.
A. is located between the scheme and the nearest land
B. separates traffic proceeding in one direction from traffic proceeding in the opposite direction
C. is designated as an anchorage area
D. contains all the traffic moving in the same directio
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安全管理评估实行企业（）_自评和公司复评、年终评估相结合的方式进行。
A. 每季度
B. 每半年
C. 一年
D. 二年
Error may be introduced into a magnetic compass by（）.
A. making a structural change to the vessel
B. a short circuit near the compass
C. belt buckles
D. All of the above
哪一项不是pre-launch LTE drive test？（）
A. Each session started from EMM-DEREGISTERED state
B. Each session started from RRC-IDLE EMM-REGISTERED state
C. Each session started from RRC-CONNECTED state
D. Each session started from pdp-connect-request
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