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无产阶级经历了各个不同的发展阶段。它反对资产阶级的斗争是和它的存在相继开始的。()
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发现水冲击，应（）。
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如果某药按一级动力学消除，这表明（）
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圆锥破碎机排矿口的调整，是借助于（）与（）的锯齿形螺纹长、降（）来实现的。
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真空表所测得的读数是（）
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下列各选项中，不属于国际货币体系主要内容的是（）
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Today ,as in every other day of the year ,more than 3000 U.S. adlescents will smoke their first cigarette on their way to becoming regular smokers as adults. During their lifetime,it can be expected that of these 3000 about 23 will be murdered,30 will die in traffic accidents, and nearly 750 will be killed by a smoking-related disease. The number of deaths attributed to cigarette smoking outweithts all other factors, whether voluntary or involuntary, as a cause of death. Since the late 1970s, when daily smoking among high school seniors reached 30 precent , smoking rates among youth have declined . While the decline is impressive ,several important issues must be raised. First, in the past several years,smoking rates among youth have declined very little. Second,in the late 1970s ,smoking among male high school seniors exceeded that among female by nearly 10 percent . The statistic is reversing.Third ,several recent studies have indicate high school dropouts have excessively high smoking rates, as much as 75 percent . Finally, thouth significant declines in adolescent smoking have occurred in the past decade,no definite reasons for the decline exist. Within this context,the Naional Cancer Instiute (NCI) began its current effort to determine the most effecive measures to reduce smoking levesl among youth. By "dropout" the author means（）.
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患者，男性，85岁。因咳嗽发热1个月，昏迷5小时入院。高血压史30余年，无明显糖尿病史。体检：体型消瘦，深度昏迷，脱水貌。四肢厥冷，双侧中、下肺可闻及湿啰音。血压10.6/5.3kPa（80/40mmHg），心率124次／分，心律不齐，未见双下肢水肿。尿糖（++++），尿酮（-），ECG提示频发室性期前收缩。初诊时，以下哪项是不能遗漏的（）
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GIS技术应用于： ()
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滴眼剂的附加剂不包括（）