单选题：Paragraph 3__________.

题目分类：卫生类
题目类型：单选题
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Paragraph 3__________. A．Effects of a stroke
B．Annual cost of stroke in the US
C．Definition and description of a stroke
D．Breakthroughs in treatment
E．Risk factors of stroke
F．Warning signs of a stroke

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某商场购进一种电冰箱，先按l5%的利润定价，此后按定价的90%出售，结果每台获利210元．这种电冰箱的成本价为多少元?A．6000 B．5000 C．4000

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阅读下文，回答题。American SportsThe United States is a sports-loving nation. Sports in

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Ekman did research in several countries and got different results.A．Right B．Wron

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Many experts remain skeptical about his claims.

Many experts remain skeptical about his claims.A．untouched B．certain C．silent D．

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