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催化以RNA为模板合成DNA的酶是
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男性，70岁。10年来患高血压病，2小时前因有不顺心的事，血压突然升高达 200/120mmHg，呼吸困难不能平卧，发生急性左心衰竭来诊。 该患者首选的降压药是
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The government of Pontran claims that Tor City, one of the six major cities in that country, is alone among Pontran’s cities in having sustained strong job growth this year. Clearly, however, any job growth there must be purely imaginary; in fact, in Tor City and only there, more people are unemployed this year than were last year. The argument countering the government’s claim depends on the assumption that
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