某小学低年级教师喜欢用“真棒、真行”表扬学生，学生往往得到激励，但随着年龄的增加，学生对其表扬不再感兴趣。这一现象说明()

下列关于诉讼时效的客体，表述正确的是（   ）。

下列有关期货公司客户账户管理的描述中，错误的是（  ）。

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_____.  .

子宫内膜异位症病灶最多见的部位是

在“细胞的多样性和统一性”的教学中，为了达成“比较真核细胞与原核细胞的结构和功能的差异”的教学目标，教师可采用下列哪种板书类型？（）

教学《林黛玉进贾府》时，为了帮助学生准确揣摩人物性格，教师组织了一场分角色扮演的活动。对于该教学活动的分析，以下说法不恰当的一项是()。

在五输穴中 ，合穴主要治疗

能引起低血钾、尿酸升高，禁用于痛风、低血钾患者的药物是（ ）

企业在生产中为生产工人发放安全头盔所产生的费用，应计入（　　）。

拖拉机厂电工张某自恃技术熟练在检修电路时不按规定操作，造成电路着火，部分设备被烧毁，损失十余万元。张某的行为构成（   ）。