高效液相色谱法发析水中酚类化合物，水样淋洗时，应选（）为淋洗液。A.碳酸氢钠溶液 B

（本小题满分12分）等比数列{a_n}中，a_n > 0(n∈N^*)，公比q∈(0,1)，且a₁a₅＋2a₃a₅＋a₂a₈＝25， a₃与a₅的等比中项为2.

(1)求数列{a_n}的通项公式；

(2)设b_n＝log₂a_n，数列{b_n}的前n项和为S_n，求数列{S_n}的通项公式；

名著知识填空。（4分）

小题1:根据《水浒》的叙述，梁山好汉议事的大厅，晁盖时称“        ”，宋江任寨主后改为“           ”，这充分体现两人思想上的巨大差异。（2分）

小题2:《西游记》第二十七回“尸魔三戏唐三藏，圣僧恨逐美猴王”中的“尸魔”就是“白骨夫人”，她是如何“三戏唐三藏”的？（2分）

Due to the increasing number of violence acts produced in schools all over the world, more and more parents prefer to have their children educated at home rather than at school． This way they can ensure their safety and well-being, although teachers and school representatives are trying to improve the situation in schools by increasing the number of the persons in charge of the safety of the students．

The main reason for violence acts are the films and cartoons that fill the children’s time． They want to do everything they watch on TV and never think of the consequences, and they may hurt a classmate or a teacher．

On the other hand, parents are not fully satisfied with the children’s results obtained in classes and they consider private classes would have better results. When a teacher has to watch 30 students in class he can’t probably see what each of them is doing, how he is writing, or if he understands the explanations． At home the teacher can explain in details everything the child doesn’t understand as many times as he considers proper. And many times the child grows fond of the teacher at home, who becomes his best friend, and who helps him whenever he needs someone to talk to.

However, the best solution would be a mixture between the education received at school and that at home, because school makes children communicate and socialize． Keeping a child at home for fear there might happen something bad to him only makes the child’s character weak and prevents him from knowing what real life is． Staying in a crystal ball only does harm to the child．

All in all, schools have been created to help children, not to harm them, so it’s best to keep children in these special places, where they learn, laugh, have fun and make new friends

小题1:The writer’s purpose in writing the text is to ________

A．teach parents the ways to keep their children safe

B．show solutions to developing children’s character

C．analyze an education problem and give opinions

D．explain the main reason for violence acts in schools小题2:Which of the following might be the best title of the passage?

A．Advantages and Disadvantages of Private Classes

B．Who is to Blame, Parents or Schools?

C．Which Is Better, School Study or Home Study?

D．The Relationship between Teachers and Children小题3:What does “a crystal ball” in the passage refer to?

A．A toy that can be used for entertainment

B．A safe and comfortable environment

C．A round object that is made of crystal

D．An obstacle that is hard to overcome小题4:We can infer from the passage that ________.

A．violence TV programs have bad effects on children’s behavior

B．the teacher at home is more patient than the teacher at school

C．children today are weak from lack of sense of right and wrong

D．there are too many students in class for a teacher to teach

小说《我的叔叔于勒》一开始便写“我”家拮据的生活环境，其目的是_______________________

关于乳突摄影体位的叙述，错误的是（）

A.许氏位--25°角侧位

B.梅氏位--双45°角位

C.许氏位--显示颅后窝

D.许氏位--显示双侧乳突侧位像

E.梅氏位--显示双侧乳突轴位像