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【判断题】
有两类鱼含有人类过敏原,一类是硬骨鱼类(如鲑鱼、鳕鱼、金枪鱼、鲤鱼等);另一类是软骨鱼类(如鲨鱼等)。
A.
正确
B.
错误
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参考答案：
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
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
参考解析：
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