初中物理某版本教科书中演示实验栏目安排的内容如图所示。该内容最适宜帮助学生学习的物理知识是（   ）。

下列资格预审方法中，可以限制投标人数量，降低招标工作量和费用的是（  ）。

盆地的主要特征是四周高(山地或高原)、中部低(平原或丘陵)。下列选项中，海拔最高的盆地是(   )

2021年9月18日，中国人民抗日战争纪念馆举行（）主题活动，旨在回望历史、追思先烈，警示人们勿忘国耻、以史为鉴、珍爱和平。2021年是九一八事变爆发（）周年。

商业银行有效的战略风险管理流程应当确保其长期战略、短期目标、（  ）和可利用资源紧密联系在一起。

符合支气管哮喘的临床表现是

具有解表清里功用的方剂是（  ）。

患者，男，18岁。急性肾小球肾炎。入院评估：患者踝部水肿明显，尿蛋白(+)。经治疗患者症状消失拟于明天出院。下列提示护理措施存在缺陷的是（  ）

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_____.  .

以下各项中，不属于天枢穴主治病证的是

戚继光抗击倭寇，郑成功收复台湾，三元里人民抗英，轰轰烈烈的义和团运动，浴血八年的全民族抗日战争等，这些爱国壮举集中体现了中华民族爱国主义优良传统中( )。