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【单选题】
关于生长激素(GH)分泌的调节，正确的是A.
快波睡眠期GH分泌达高峰
B.
GH过多促进GHRH分泌
C.
正常状态下GHRH的作用大于GH-RIH
D.
IGF-I正反馈促进GH的分泌
E.
低血糖抑制GH分泌
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Cutting into demand for Nokia's handsets.
B.
Promote other economies.
C.
Many firms break down.
D.
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A.
Cutting into demand for Nokia' s handsets.
B.
Promote other economies.
C.
Many firms break down.
D.
Many handsets don' t sell.
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A.
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B.
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C.
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D.
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A.
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B.
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C.
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D.
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E.
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