根据生理效应，肾上腺素受体分为α受体和β受体，α受体分为α₁、α₂等亚型，β受体分为β₁、β₂等亚型。α₁受体的功能主要为收缩血管平滑肌，增强心肌收缩力；α₂受体的功能主要为抑制心血管活动，抑制去甲肾上腺素、乙酰胆碱和胰岛素的释放，同时也具有收缩血管壁平滑肌作用。β₁受体的功能主要为增强心肌收缩力、加快心率等；β₂受体的功能主要为松弛血管和支气管平滑肌。
胰岛细胞上的β受体属于β₂亚型，根据肾上腺素受体的功能分析，对于合并糖尿病的室上性心动过速患者，宜选用的抗心律失常药物类型是(  )

固有免疫细胞表面的PRR不包括

幼儿园应当建立幼儿健康检查制度和幼儿健康卡或档案。每（     ）体检一次，每半年测身高、视力一次，每季度量体重一次。注意幼儿口腔卫生，保护幼儿视力。

十四届全国人民代表大会第一次会议，3月13日上午在北京人民大会堂闭幕。从现在起到本世纪中叶，（  ），是全党全国人民的中心任务。

在COVID-19的防控中，各地均推出防控健康码，并作为居民出行的健康凭证，取得了一定的防控效果。下列哪项符合该例的卫生伦理原则（    ）。

Passage1

Today's adults grew up in schools designed to sort us into the various segments of our social and economic system. The amount of time available to learn was fixed: one year per grade. The amount learned by the end of that time was free to vary: some of us learned a great deal；some，very little. As we advanced through the grades，those who had learned a great deal in previous grades continued to build on those foundations. Those who had failed to master the early prerequisites within the allotted time failed to learn that which followed. After 12 or 13 years of cumulative treatment of this kind，we were，in effect，spread along an achievement continuum that was ultimately reflected in each student's rank in class upon graduation.

From the very earliest grades, some students learned a great deal very quickly and consistently scored high on assessments. The emotional effect of this was to help them to see themselves as capable learners, and so these students became increasingly confident in school. That confidence gave them the inner emotional strength to take the risk of striving for more success because they believed that success was within their reach. Driven forward by this optimism, these students continued to try hard, and that effort continued to result in success for them. They became the academic and emotional winners. Notice that the trigger for their emotional strength and their learning success was their perception of their success on formal and informal assessments.

But there were other students who didn't fare so well. They scored very low on tests, beginning in the earliest grades. The emotional effect was to cause them to question their own capabilities as learners. They began to lose confidence, which, in turn, deprived them of the emotional reserves needed to continue to take risks. As their motivation warned, of course, their performance plummeted. These students embarked on what they believed to be an irreversible slide toward inevitable failure and lost hope. Once again, the emotional trigger for their decision not to try was their perception of their performance on assessments.

Consider the reality-indeed, the paradox-of the schools in which we were reared. If some students worked hard and learned a lot, that was a positive result, and they would finish high in the rank order. But if some students gave up in hopeless failure, that was an acceptable result, too, because they would occupy places very low in the rank order. Their achievement results fed into the implicit mission of schools: the greater the spread of achievement among students, the more it reinforced the rank order. This is why, if some students gave up and stopped trying (even dropped out of school), that was regarded as the student's problem, not the teacher's or the school's.

Once again, please notice who is using test results to decide whether to strive for excellence or give up in hopelessness. The"data-based decision makers" in this process are students themselves.

Students are deciding whether success is within or beyond reach, whether the learning is worth the required effort, and so whether to try or not. The critical emotions underpinning the decision making process include anxiety, fear of failure, uncertainty, and unwillingness to take risks-all triggered by students' perceptions of their own capabilities as reflected in assessment results.

Some students responded to the demands of such environments by working hard and learning a great deal. Others controlled their anxiety by giving up and not caring. The result for them is exactly the opposite of the one society wants. Instead of leaving no child behind, these practices, in effect, drove down the achievement of at least as many students as they successfully elevated. And the evidence suggests that the downside victims are more frequently members of particular socioeconomic and ethnic minorities.

Which of the following describes the paradox of the schools？

刚性挡土墙与土相互作用的最小土压力是（   ）土压力。

某人的红细胞与B型血的血清凝集，其血清与B型血的红细胞也凝集，此人血型为

下列场所需要设置室内消火栓的是(   ）。

纳木错被称为“天湖”，位于西藏中部，为世界上海拔最高的大型湖泊，也是中国第二大咸水湖。（   ）

用于治疗过敏性结膜炎的药物是（    ）