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疟疾发作期有哪些特点?
The number of cheetahs on an African reserve varies directly as the number of zebras on the reserve varies, according to the equation c=kz, where c is the number of cheetahs, z is the number of zebras, and k is a constant. If there are 4 cheetahs on the reserve when there are 1,500 zebras, how many cheetahs would there be if there were 3,750 zebras?
目前临床上根据药物疗效和不良反应所确定的-线抗结核药物是()
羊水栓塞常发生于以下哪个阶段()
在什么条件下,税收不会产生无谓损失?
肺炎患儿进食不足或不能进食时,输注液体宜选用( )。
哪种类型的肾损伤对病人危害最大?( )
关于机车高、低温水循环系统的叙述,正确的是()。
水饮凌心型心悸治宜()
有助于金石、贝壳类药物消化的药物是()。
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