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【多选题】
下列有关氮平衡说法正确的是：A.
氮平衡指摄入的氮与尿中排出氮的对比关系
B.
氮平衡指 体内总的含氮量与每日排出氮量的对比关系
C.
氮平衡指 消化吸收的氮与未吸收的氮的对比关系
D.
氮平衡指 摄入氮与排出氮的对比关系
E.
氮正平衡，氮负平衡均见于正常成人
F.
总氮平衡常见于儿童
G.
反映体内蛋白质代谢概况
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【单选题】According to the conversation, what are the experts now recommending?
A.
Exercising the entire body.
B.
Having your blood pressure taken daily.
C.
Losing weight prior to exercising.
D.
Weighing in before each exercise session.
【简答题】A．cleaing B．writing C．drawing D．exercising
【单选题】This article explains_________．
A.
the digiculties of exercising
B.
why exercising is good for your health
C.
important information to know about exercising
D.
why people have some wrong ideas about exercising
【单选题】How about _ _ after dinner? [ ]
A.
exercising walking
B.
to exercise walk
C.
to exercising walking
【简答题】Exercising your brain every day is beneficial_______.
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