公共紧急状态的含义是什么？

近年来，由于快速、便捷、即时等特性，网络已经成为我国公民议政、问政的重要渠道，是当前公民有序政治参与的新形式。公民有序地参与政治生活，必须坚持以下原则[ ]

①权利与义务相统一               ②公民在法律面前一律平等 

③执法必严、违法必究             ④以德治国与以法治国相结合

A．①②        

B．①③        

C．②④       

D．③④

脾显像（）

A.⁹⁹ⁿTc-植酸钠

B.⁹⁹ⁿTc-硫胶体

C.⁹⁹ⁿTc-亚甲基二膦酸盐

D.⁹⁹ⁿTc-亚锡胶体

E.⁹⁹ⁿTc-变性红细胞下列脏器显像，选用最优的显像剂是

板形标准曲线的作用是什么？

Part 3

Questions 19-25

·Read the following passage and answer questions 19-25.
·For questions 19-25, choose the correct answer from A, B, C and D.
·Markyour answers on the Answer Sheet.
It is natural for young people to be critical of their parents at times and to blame them for the most of the misunderstandings between them. They have always complained, more or less justly, that their parents are out of touch with modern way; that they are possessive and dominant; that they don’t trust their children to deal with the crisis; that they talk too much about certain problems — and that they have no sense of humor, at least in parent-child relationships.
I think it is true that parent often underestimate their teenage children and also forget how they themselves felt when young.
Young people often irritate their parent with their choices in clothes and hairstyles, in entertainers and music. This is not their motive. They feel cut off from adult world into which they have not yet been accepted. So they create a culture of society of their own. Then, it turns out that their music and entertainers or vocabulary or clothes or hairstyles irritate their parents. This gives them additional enjoyment. They feel they are superior, at least in a small way, and they are leaders in style and taste.
Sometimes you are resistant, and proud because you don’t want your parents to approve what you do. If they did approve, it looks as if you are betraying your own age group. But in that cases, you are assuming that you are an underdog: you can’t win but at least you can keep your honor. There is a passive way of looking at things. It is natural enough after long years of childhood, when you are completely under your patents’ control. But it ignores the face that you are now beginning to be responsible for yourself.
If you plan to control your life, cooperation can be part of that plan. You can charm others, especially your parents, into doing things the way you want. You can impress your parents with your sense of responsibility and initiative, so that they will give you the authority to do what you want to do.

According to the author, which statement the passage didn’t refer to

A．Parents often underestimate their teenage children.

B．Young people make their parents angry because their choices in clothes and hairstyles.

C．Young people want to communicate with their parents.

D．Teenagers don’t want their parents to approve of what they do.

关于B细胞和T细胞的叙述，正确的是（）

A.造血干细胞在骨髓内发育成T细胞，在胸腺中发育成B细胞

B.B细胞只参与体液免疫，T细胞只参与细胞免疫

C.受抗原刺激后，分化出的记忆细胞的功能相同

D.B细胞和T细胞中表达的基因不同，导致功能不同