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下列属于人力资本投资活动的是（ ）。
意志活动的重要特征在于其（）
人类从诞生之日起就在与疾病作斗争，各种疾病中最容易让人产生恐慌的是大范围传染性疾病。短短几年来，人们充分见识了重大疫情的威胁。特别是这次甲型H1N1流感疫情，蔓延速度之快，范围之广。令人吃惊。这不能不引起人们的警觉，所以说，人类与传染病斗争未有穷期。 以下哪项如果为真，最不支持以上的结论？（ ）
在社会生产方式中，（ ）是最活跃、最革命的因素。
请阅读 Passage 1,完成第21~25小题。Passage 1Why has crime in the U.S. declined so dramatically since the 1990s?Economists and sociologists have offered a bounty of reasons, including more police, more security technology, more economic growth, more immigration, more imprisonment, and so on.The "real" answer is almost certainly a combination of these factors, rather than one of them to the exclusion of the rest. But a new paper adds a surprising variable to the mix. What if the decline of crime in America started with the decline of cash?Cash is critical to the health of an underground economy, because it's anonymous, nearly untraceable, and easily stolen. This makes it the lifeblood of the black market.But Americans are rapidly abandoning cash thanks to credit cards, debit cards, and mobile payments. Half a century ago, cash was used in 80 percent of U.S. payments. Now that figure is about 50 percent, according to researchers.In the 1980s, the federal government switched from paper money to electronic benefit transfers. They didn't switch all at once. They switched one county at a time within states. This created a kind of randomly controlled environment for the researchers, who studied Missouri's counties to establish whether the areas that switched from welfare cash to electronic transfers saw a concurrent decline in crime.The results were striking: The shift away from cash was associated with "a sigpificant decrease in the overall crime rate and the specific offenses of burglary and assault in Missouri and a decline in arrests." In other words, the counties saw a decline in specific crimes when they switched away from cash welfare.Perhaps most interestingly, they found that the switch to electronic transfers reduced robbery but not rape, suggesting that the move away from cash only had an impact on crime related to getting and spending cash.The move toward cashlessness in the U.S. continues quickly. Google now lets you attach money to emails to send to friends, which means that for some shoppers, pulling out your credit card could become as rare as finding exact change in your coin purse. It might seem absurd to imagine Visa, Square, and Google Wallet as crime-fighting technologies. But with a better understanding of how cash's availability affects crime, perhaps the government should consider killing more than just the penny.Which of the following would be the most appropriate title for this text?
在调查中虽然应答率很高，但在获得信息的过程中出现各种误差，结果产生了偏倚，称之为（）
农药使用过程，下面（）行为是正确的？
弗洛伊德的心理性欲发展学说认为性欲发展可分为：口欲期、肛欲期、恋母期及生殖器期、潜伏期和（ ）
甲公司是一张3个月以后到期的银行承兑汇票所记载的收款人。甲公司和乙公司合并为丙公司，丙公司于上述镖局到期时向承兑人提示付款。下列表述中，正确的是（ ）。
依据《保险法》的相关规定，保险合同在（）时成立。
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本线不封锁，邻线速度Vmax≤60 km/h（线间距小于6.5m）时，本线下道有何规定？
邻线（线间距小于6.5m）来车，本线不封锁时下道规定：邻线速度秒Vmax≤（）km/h时，本线可不下道。
邻线（线间距小于6.5m）来车，本线不封锁时下道规定：邻线速度秒Vmax≤（）km/h时，本线可不下道。
本线不封锁，邻线速度Vmax≤60 km/h（线间距小于6.5m）时，本线下道有何规定？
邻线（线间距小于6.5m）来车下道规定：本线不封锁时：邻线速度vmax≤60km/h时，本线（）。
邻线（线间距小于6.5m）来车下道规定：本线不封锁时：邻线速度vmax≤60km/h时，本线（）。
本线封锁，邻线速度Vmax≤120km/h（线间距小于6.5m）时，本线下道有何规定？
本线封锁，邻线速度Vmax＞160km/h（线间距小于6.5m）时，本线下道有何规定？
本线不封锁，邻线（线间距小于6.5m）来车，邻线速度vmax＞120km/h时，（）。
本线封锁，邻线速度Vmax＞160km/h（线间距小于6.5m）时，本线下道有何规定？