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Practice 6 Most people would be impressed by the high quality of medicine available to most Americans. There is a lot of specialization, a great deal of attention to the individual, a vast amount of advanced technical equipment, and intense effort not to make mistakes because of the financial risk which doctors and hospitals must face in the courts if they handle things badly. But the Americans are in a mess. The problem is the way in which health care is organized and financed. Contrary to public belief, it is not just a free competition system. The private system has been joined a large public system, because private care was simply not looking after the less fortunate and the elderly.
补账交易中税票登记借方为收入类科目时，当原收费交易已开具了专票且超过180天。已开具红票的情况下，可以退费交易，但退费金额（）。
在交易达成时，批发商和买方约定在一定时期内付货，这种批发方式叫做（）。
杂种优势表现较弱的是在（）。
患者，50岁，双眼不适10余年，加重1个月。检查：双眼睑结膜肥厚，网状瘢痕，上睑内翻，泪膜破裂时间6秒，最可能诊断为（）
一早产儿，出生体重2.5kg，生后第1天其需水量及中性温度应分别为（）
机体与环境的统一是（）保持着复杂的对立统一关系。
什么是触发器？触发器的主要用途有哪些？
关于急性上呼吸道感染的部位正确的是（）。
TCP/IP的核心思想是：对于OSI，在传输层和网络层建立一个统一的（）网络，以屏蔽物理层和数据链路层的有关部分的硬件差别，从而实现普遍的连通性。