范仲淹进行“庆历新政”的目标是()，通过提高官员队伍素质，达到克服统治危机，稳定统治秩序的目的。

抵质押率的计算公式是（  ）。

为了由样本推断总体，样本应该是

发生液性病变时可穿刺出不凝固血性液体的肿瘤是

基金管理人的（  ） 负责组织指导公司监察稽核工作，履行职责的范围应当涵盖基金及公司运作的所有业务环节。

女，26岁。既往体健。B超结果显示早孕8周，胚胎存活。查体时，以下哪项描述是正确的（    ）。

脉象特征形细而行迟，往来艰涩不畅，脉势不匀，如轻刀刮竹，其临床意义是

以下关于“直客式”个人贷款营销模式的表述错误的是（　　）。

关于消防控制室控制和显示功能的说法，错误的是（   ）。

海市蜃楼是在剧烈的温度梯度下在空中或地平线下出现的奇异幻景，常发生在海边、沙漠和极地冰原地区。下列选项中，形成海市蜃楼的光学现象是（   ）

请阅读  Passage 1,完成第  21~25小题 。

Passage 1

First two hours, now three hours-this ishow far in advance authorities are recommending people show up to catch adomestic flight, at least at some major U.S. airports with increasingly massivesecurity lines.

Americans are willing to toleratetime-consuming security procedures in return for increased safety. The crash ofEgyptAir Flight 804, which terrorists may have downed over the Mediterranean Sea,provides another tragic reminder of why. But demanding too much of airtravelers or providing too little security in return undermines public supportfor the process. And it should: Wasted time is a drag on Americans ' economicand private lives, not to mention infuriating.

Last year, the Transportation SecurityAdministration (TSA) found in a secret check that undercover investigators wereable to sneak weapons-both fake and real-past airport security nearly everytime they tried. Enhanced security measures since then, combined with a rise inairline travel due to the improving economy and low oil prices, have resultedin long waits at major airports such as Chicago ' s O ' Hare International. Itis not yet clear how much more effective airline security has become-but thelines are obvious.

Part of the issue is that the governmentdid not anticipate the steep increase in airline travel, so the TSA is nowrushing to get new screeners on the line. Part of the issue is that airportshave only so much room for screening lanes. Another factor may be that morepeople are trying to overpack their carry-on bags to avoid checked-baggagefees, though the airlines strongly dispute this.

There is one step the TSA could take thatwould not require remodeling airports or rushing to hire: Enroll more people inthe PreCheck program. PreCheck is supposed to be a win-win for travelers andthe TSA. Passengers who pass a background check are eligible to use expectedscreening lanes. This allows the TSA to focus. on travelers who are higherrisk, saving time for everyone involved. The TSA wants to enroll 25 millionpeople in PreCheck.

Ithas not gotten anywhere close to that, and one big reason is sticker shock:Passengers must pay $85 every five years to process their background checks.Since the beginning, this price tag has been PreCheck ' s fatal flaw. Upcomingreforms might bring the price to a more reasonable level. But Congress shouldlook into doing so directly, by helping to finance PreCheck enrollment or tocut costs in other ways.

The crash of EgyptAir Flight 804 is mentioned to_____.  .