配制混凝土时，选用的粗骨料最大粒径不得超过钢筋最小间距的(   )。

患者，女，22岁。停经47天，不规则阴道出血伴下腹隐痛5天，查血hCG:2641IU/L，B超提示左卵巢旁包块4.2cm×3.3cm，诊刮宫内未见绒毛，应首选的治疗方案是

既是络穴，又是八脉交会穴的腧穴是（    ）

急性早幼粒细胞白血病的基因改变常常是（）。

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 word "expedited" (Para. 5) is closest in meaning to______.

关于招标文件的说法,正确的是（）。

某男，20年前患者不明原因常在晨起时出现头晕、头胀痛（头额颞部为甚）、记忆力减退、注意力不集中、睡眠欠佳。激动或劳累后头晕、头胀痛明显加重。在当地医院诊断为“原发性高血压”，给予降压等相关治疗，病情明显好转。关于卡托普利，下列哪种说法是错误的

患者，女，37 岁。症见胃脘疼痛、痞胀不适、口干口苦、纳少消瘦。西医诊断为慢性胃炎，中医诊断为胃痛。证属脾胃气阴两虚，医师处以养胃舒胶囊。养胃舒胶囊的药物组成中有干姜，该药物的药性和功效分别是（      ）

据2021年1月13日报道，近期，我国科学家用新技术首次实现了____的远距离量子纠缠“纯化”，纯化效率比此前国际最好水平提升了6000多倍。

无并发症的肺炎链球菌肺炎最主要的治疗措施是

“坐地日行八万里，巡天遥看一千河”,这一著名诗句包含的哲理是（    ）