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【简答题】
海产鱼类中的青皮红肉鱼，如鲐鱼（青专鱼）、金枪鱼、沙丁鱼、秋刀鱼等鱼体中含有较多的（），当鱼体不新鲜或腐败时，其就会分解形成（），从而引起中毒。
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【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
相关题目：
【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
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