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【单选题】
鉴别原发性纤溶症与继发性纤溶症最重要的试验是A.
血浆纤溶酶测定
B.
血浆D-聚体测定
C.
血浆纤溶酶原测定
D.
血浆纤维蛋白降解产物测定
E.
血浆组织纤维溶酶活化药抗原测定
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【单选题】If the demand for digital cameras increases when consumersʹ incomes rise, then digital cameras are
A.
a normal good.
B.
an inferior good.
C.
a substitute for film cameras.
D.
a complement to film cameras.
E.
made using advanced technology.
【简答题】Digital cameras usually store images in the format of______.
【单选题】We observe that the equilibrium price of digital cameras has fallen and the equilibrium quantity of digital cameras has increased. Which of the following events could be responsible for this?
A.
Technological advances in digital camera production.
B.
Consumers' preferences changed in favor of digital cameras.
C.
The price of film cameras rose.
D.
Workers who make digital cameras received a pay raise.
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