The ARPA may swap targets when automatically tracking if two targets（）
A. are tracked on reciprocal bearings
B. are tracked at the same range
C. are tracked on the same bearing
D. pass closely to each other
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If a seaplane is not used as a means of transpiration on water but is capable of being used so，it shall（）.
A. be regarded as a vessel not under command
B. be regarded as a vessel underway
C. be regarded as a vessel
D. be regarded as a sailing vessel
上级互联网信息内容管理部门对下级互联网信息内容管理部门实施的行政执法进行（）
A. 考核
B. 考察
C. 监督
D. 督查
开采冲击地压煤层必须认真落实冲击地压防治“一先四不”方针：（）严禁进行生产。
信息系统的开发过程一般包括系统规划、（）、系统设计、系统实施、（）五个步骤。
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