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【单选题】
血氧容量正常、动脉血氧分压和血氧含量正常，静脉血氧分压与血氧含量高于正常见于（）A.
心力衰竭
B.
呼吸衰竭
C.
失血性休克
D.
亚硝酸盐中毒
E.
CO中毒
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反馈参考答案：
举一反三
【简答题】I. Introduction Knowing _________________________ 1 is the most important in presenting products.
【单选题】It isessential to know how to make a proper introduction.
A.
impolite
B.
polite
C.
suitable
D.
right
【简答题】Our terms of payment are by irrevocable L/C payable by sight draft against presentation of shipping document.
【单选题】It is important to know how to make a proper introduction.
A.
polite
B.
impolite
C.
right
D.
suitable
【简答题】A．Look at his. B．Susan doesn't know. C．I don't know. D．Neither do I.
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