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【单选题】
劳动时人体所需的氧量取决于劳动强度；强度越大，需氧量也越多。下列说法正确的是A.
劳动1秒钟所需要的氧量叫氧需
B.
氧需能否得到满足主要取决于呼吸器官的功能
C.
氧需和实际供氧不足的量叫氧债
D.
成年人最大摄氧量不超过4L
E.
锻炼者有的可达8L以上
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A.
set out
B.
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D.
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A.
such little
B.
a little
C.
so little
D.
just little
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A.
in honor of
B.
in case of
C.
in charge of
D.
in need of
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