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【单选题】
2014年马航MH370失联后，曾用“蓝鳍金枪鱼-21”型自主式水下航行器开展搜寻作业，其原理是依靠声呐设备在海底扫描，但一整天只能搜寻相当于一个（）大小的区域。
A.
羽毛球场
B.
篮球场
C.
网球场
D.
足球场
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参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】Passage Four Initial voyages into space introduced questions scientists had never before considered. Could an astronaut swallow food in zero gravity To keep things simple, astronauts on the Project ...
A.
was an unusual problem among astronauts
B.
was what puzzled the early scientists
C.
caused new problems in space flights
D.
drew the attention of the general public
【单选题】Initial voyages into space introduced questions scientists had never before considered. Could an astronaut swallow food in zero gravity To keep things simple, astronauts on the Project Mercury ate foo...
A.
the variety of food options in space
B.
the dietary need of astronauts in space
C.
the problems of living in the space station
D.
the improvement of food offered in space
【单选题】2014年马航MH370失联后，曾用“蓝鳍金枪鱼-21”型自主式水下航行器开展搜寻作业，其原理是依靠声呐设备在海底扫描，但一整天只能搜寻相当于一个（）大小的区域。
A.
羽毛球场
B.
篮球场
C.
网球场
D.
足球场