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【单选题】
Cori循环是指A.
肌肉从丙酮酸生成丙氨酸，肝内丙氨酸重新变成丙酮酸
B.
肌肉内葡萄糖酵解成乳酸，有氧时乳酸重新合成糖原
C.
肌肉内蛋白质降解生成丙氨酸，经血液循环至肝内异生为糖原
D.
肌肉内葡萄糖酵解成乳酸，经血循环至肝内异生为葡萄糖供外周组织利用
E.
肌肉内蛋白质降解生成氨基酸，经转氨酶与腺苷酸脱氨酶偶联脱氨基的循环
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反馈参考答案：
举一反三
【简答题】一个天文单位是指：
【单选题】They returned form a _____ trip to the United States.
A.
three day
B.
three day's
C.
three-days
D.
three-day
【简答题】一个天文单位是指________,其数量约为_______。
【单选题】A company that produces racing motorbikes has several models that sell well within the motorcycle racing community and which are very profitable for the company. Despite having a profitable product, w...
A.
Profits from the sales of popular models will be lost when returned to the shareholders in the form of dividends.
B.
New models will require a lot of money to develop and bring to market before they generate any revenue.
C.
The company will have built up debts which must be repaid in order to bring the current models to market.
D.
Equity must be raised to finance the development of new models to replace the existing models.
【简答题】天文学上常用“天文单位”来表示距离，一个天文单位指的是（ ）。
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