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【单选题】
组成人体的八大系统中,与新陈代谢有直接关系的四大系统是( )A.
运动、循环、消化和呼吸
B.
神经、泌尿、呼吸和消化
C.
循环、消化、呼吸和泌尿
D.
呼吸、泌尿和内分泌
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A.
We are always worried about …
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we always look forward to ...
C.
we are always aware of …
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we always put up with …
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