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由于臭氧层中臭氧的减少，照射到地面的太阳光紫外线会（）。
建设项目在（）阶段，由建设用地单位（或筹备组）向国土资源管理部门提出预审申请。
Questions 21 to 25 are based on the following passage. Lead deposits, which accumulated in soil and snow during the 1960’s and 70’s, were primarily the result of leaded gasoline emissions originating in the United States. In the twenty years that the Clean Air Act has mandated unleaded gas use in the United States, the lead accumulation worldwide has decreased significantly. A study published recently in the journal Nature shows that air-borne leaded gas emissions from the United States were the leading contributor to the high concentration of lead in the snow in Greenland. The new study is a result of the continued research led by Dr. Charles Boutron, an expert on the impact of heavy metals on the environment at the National Center for Scientific Research in France. A study by Dr. Boutron published in 1991 showed that lead levels in arctic (北极的) snow were declining. In his new study, Dr. Boutron found the ratios of the different forms of lead in the leaded gasoline used in the United States were different from the ratios of European, Asian and Canadian gasolines and thus enabled scientists to differentiate (区分) the lead sources. The dominant lead ratio found in Greenland snow matched that found in gasoline from the United States. In a study published in the journal Ambio, scientists found that lead levels in soil in the Northeastern United States had decreased markedly since the introduction of unleaded gasoline. Many scientists had believed that the lead would stay in soil and snow for a longer period. The authors of the Ambio study examined samples of the upper layers of soil taken from the same sites of 30 forest floors in New England, New York and Pennsylvania in 1980 and in 1990. The forest environment processed and redistributed the lead faster than the scientists had expected. Scientists say both studies demonstrate that certain parts of the ecosystem (生态系统) respond rapidly to reductions in atmospheric pollution, but that these findings should not be used as a license to pollute. The authors of the Ambio study have found that（）
经CT导引下腹腔穿刺术适应证不包括（）
两台LANSWITCH通过100M端口对接，如果一端支持自协商，一端不支持自动协商（100M全双工），则一般情况下支持自动协商的一端会将自己设定为（），从而导致丢包。
NG加气站系易燃易爆场所，属于重点防火部门，对气站的安全管理应以预防为主，严密防范，要把安全管理的切入点放在防范火灾和爆炸之上。不应制定事故应急处理预案。（）
腰部后伸法时患者的体位一般为（）
夜间巡视作业组巡视人员有（）名组成。
现代奥运史上唯一一位蝉联女子百米冠军的运动员泰厄斯，你知道她的绰号是什么吗？（）
诚信信息查询记录包括（）。 Ⅰ.査询者 Ⅱ.查询对象 Ⅲ.査询原因 Ⅳ.査询时间
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（）协议的代表包括：Telnet、FTP、HTTP、SNMP、DNS等。
HTTP，FTP，DNS是应用层协议。
HTTP，FTP，DNS是应用层协议。
应用层协议的代表包括：（）、FTP、HTTP、SNMP、DNS等。
应用层协议的代表包括：（）、FTP、HTTP、SNMP、DNS等。
应用层协议的代表包括：Telnet、FTP、HTTP、（）、DNS等。
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