结合班主任工作的内容与方法的要求，论述现时期如何做一名优秀的中学班主任。

       The World Clown  (小丑) Festival opened at People Square in Liuzhou on May 1st. Over 60 clown artists from 10 countries got together there. Clowns with bright hair, red noses, big shoes,big smiles and all kinds of funny movements crowded into Liuzhou. Local people enjoyed clown art from western and the festival had brought huge happiness to the city at the very first day.      

        Clown artists performed in the morning from 9 a. m. So many clowns lighted up the stage (活动场所) as an excellent world funny event,and the stage was full of people who laughed as clown performed like being in their childhood again.      

       There was not only European feature (特色) but also Liuzhou's local flavor (风情) in the festival. Songs from Zhuang people.dances from Yao people.events from Miao ,and" big songs" from Dong were performed to create a happy festival with international and national features. The festival finished at May 7th.

1. Where was the festival opened?          

A. In a cinema.        

B. In a park.      

C. At a square.          

D. In a shopping center. 

2. How long did the World Clown Festival last? 

A. Four days.          

B. Five days,    

C. Six days.            

D. Seven days.  

3. What does the underlined word" movement" mean? 

A. An excellent world funny event.    

B. An act of moving the body or parts of the body.    

C. A group of people who share the same ideas.    

D. A change in what people do or think.  .

4. Which of the following is NOT mentioned in the passage?  

A. More than 60 clown artists from 10 countries came to Liuzhou.    

B. People could enjoy not only clown performance but also Peking Opera.    

C. Dong people performed " big songs" at the festival.    

D. The festival brought much happiness to the local people

下列各项所述的两个量，前者一定大于（或高于）后者的是（　　）

A．F₂和Br₂的沸点

B．H^-和H⁺的离子半径

C．同温下同压分别在1升水中最多能溶解的Cl₂和SO₂的体积

D．在NH₃+NO→N₂+H₂O反应中，被氧化和被还原的N原子数

初次发作的房颤且在24～48小时以内，称为急性房颤

中国（上海）自由贸易实验区是国内首个符合国际惯例的海关特殊监管区，和国内目前的各类保税区相比，自由贸易区意味着更优惠的政策、更大的开放度。建设中国（上海）自由贸易实验区表明我国（）

①实行更加积极主动开放的战略举措

②构建改革开放新平台，拓展经济增长新空间

③“走出去”战略进入了一个新阶段

④主动应对经济全球化，主导世界市场新发展

A.①②

B.②③

C.①④

D.③④

提高抽提贫溶剂量时不用考虑回流芳烃量的大小