在每层的排风支管上设置排烟防火阀的建筑防火防排烟系统形式是（）。A.自然排烟 B.加

具有清热解毒、清肺化痰功效的药物是（）

A.黄连

B.苦参

C.硼砂

D.乌梅

E.土茯苓

It was quite late at night. I was reading a newspaper in my room when I heard someone knocking at the door. I opened it and saw a young man with glasses standing there. Of course, I didn’t know him. He said that he was a friend of my sister’s and wanted to have a talk with her. I wanted to know if my sister had such a friend，but I had to let him in.

As he talked, I found that he knew nothing about my sister. Then I came to know that his words were not true. Suddenly my sister came back and the young man was so surprised that he didn’t know what to do for a moment. I caught the man by the arm at once while my sister was calling the police.

（  ） 1. This happened _____.

A. on one morning              B. on one afternoon

C. on one evening               D. on one night

（  ） 2. There _____ in the room when someone was knocking at the door.

A. was one person                     B. were two persons

C. were three persons                D. were four persons

（  ） 3. The writer saw the young man for the _____ time.

A. first      B. second          C. third      D. fourth

（  ） 4. The young man _____.

A. was a friend of the writer’s    B. was a friend of his sister’s

C. was a stranger to them       D. both A and B

（  ） 5. The young man was _____ when he saw the writer’s sister.

A. sad       B. surprised      C. happy        D. sorry

特种经济动物按经济用途分类：。按动物类别分：（）、特种禽类动物、（）、其他。按动物的生物学分：哺乳类，（），两栖类和爬行类，其他类。

发审委委员应当及时提出回避的情形为（）。

A.发审委委员或者其亲属担任发行人或者保荐机构的董事、监事、经理或者其他高级管理人员

B.发审委委员或者其亲属持有发行人的股票，可能影响其公正履行职责

C.发审委委员或者其所在工作单位近三年来为发行人提供保荐等服务，可能妨碍其公正履行职责

D.发审委会议召开前，与本次所审核发行人及其他相关单位或者个人进行过接触，可能影响其公正履行职责

酶与一般催化剂的相同点是（）

A.催化效率极高

B.高度专一性

C.降低反应的活化能

D.改变化学反应的平衡点

E.催化活性可以调节