一条抛物线经过点A（-2，0）、B（4，0），且抛物线的顶点是（1，-3），求满

下列肾脏何种结构主动转钠，而水则随着被动重吸收（）

A.髓质收集管

B.髓襻降支

C.髓襻升支

D.远端小管

E.近端小管

[1]Why is physical education important for students? There are many reasons. First of all, this subject helps them achieve the primary goal of physical education, which is physical fitness. As part of this, they can learn that it is highly important to include exercise and physical activities as part of their lifestyle.

[2]Physical education helps children achieve a healthy lifestyle. Inside the classroom, teachers educate kids about highly relevant issues such as the importance of hygiene (卫生) and health. This subject will help them realize the importance of having strong bodies. Likewise, it will also teach them how to have a healthy and an active lifestyle.

[3]Taking PE classes can help              of students. Being confident is very important to them as they grow and become responsible as well as competitive adults someday. This aspect (方面) of physical education is extremely important in the character development of students. Furthermore, it will teach them how to have a positive attitude.

[4]Physical education can teach students a set of all-important values. For example, it teaches students to fight like sportsmen and to cooperate with others to achieve one common goal as a team.

[5]Physical education also helps students develop their motor skills. On this kind of program, they are placed in situations where they can further develop and improve their reflexes (反应), concentration and body posture. By taking this class, they can realize their full potential as individuals and as part of a team.

[6]Moreover, physical education is also a means of enjoyment for students. By engaging in sports and physical activities, they can spend some pleasant time away from their other usual academic subjects. By doing so, they can achieve healthy minds and bodies.

小题1:What’s the text mainly about? (no more than 6 words)

小题2:What does the underlined word “it” (Line 3 paragraph 2) probably refer to? (no more than 3 words)

小题3:Fill in the blank in Paragraph 3 with proper words. (no more than 4 words)

小题4:Based on the text, list two values that students can learn in PE classes. (no more than 6 words)

小题5:How can a student keep healthy physically and mentally? (no more than 9 words)

应用尚无文献报道的抗血清或自己制备的抗血清进行免疫酶组织细胞化学染色时，必须设置的对照是（）

A.交叉实验

B.替代实验

C.吸收实验

D.置换实验

E.阳性对照

在防止麻醉意外方面，最有意义的监测项目是（）

A.脉搏氧饱和度和呼气末二氧化碳监测

B.体温和电解质监测

C.无创血压和ECG监测

D.呼吸机报警和吸入氧浓度监测

E.潮气量和气道压监测

在考生文件夹下存在一个数据库文件samp1.mdb和一个空数据库samp.mdb，其中samp1.mdb数据库文件中已建立好表对象tNorm。试按以下要求，完成各种操作。

删除“备注”字段；删除“规格”字段值为“220V-4W”的记录。