以下哪项不是肝素的作用（   ）。

有一类儿童对母亲在不在场都无所谓，母亲离开时，他们并不表示反抗，很少有紧张、不安的表现；当母亲回来时，也往往不予理会，自己玩自己的。他们属于哪种依恋类型？(  )

以下关于房地产开发企业土地增值税清算的表述中，错误的是（　　）。

既能消食健胃，又能回乳消胀的药物是

对违反药品管理法及有关法规的行为或决定，提出劝告、制止、拒绝执行并向上级报告是（）

中国研制的第一台一亿次巨型计算机是(　　)。

男 ，32岁 。肛门胀痛，逐渐加重，伴畏寒发热3天。查体 ：左侧肛周皮肤稍红，指诊发现距肛门4cm左侧偏后有明显压痛 、肿胀。首先应考虑的是

治疗痰瘀互结型子宫内膜异位症，应首选的方剂是(   )

金刚烷胺和美金刚合用

某教师在《我有一个梦想》一课结束后，设计了这样一个活动：到图书馆查阅资料，了解美国黑人的历史和现状，在班里开展一个读书报告会。对这一设计理解不正确的是()。

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_____.  .