元素的地球化学迁移

阅读理解。

     My name is Katrina．When I was nine years old, I often played on my elder brother's waterbed

(水床)．He had a lot of coins and I often put them in my mouth and played with them．

     One day, I had one coin in my mouth and the waterbed started moving．As a result, the movement

made me choke(噎住)on the coin．I ran into the living room coughing with my hand around my throat．My mom ran towards me．Before she could get to me, I gave one strong cough and swallowed(吞)the

coin!

     I let my mom know that I had choked on a coin and swallowed it．So, she called up my elder

brother and then I was taken to the hospital．It turned out that the coin was right in my esophagus

(食道); it didn't move at all．I had to get doctors to take the coin out．They put me to sleep, put

something with a camera down my throat and pulled the coin out．

     Ever since I got out of the hospital, my family and friends have enjoyed calling me "The Human Piggy

Bank"．What an embarrassing experience! Now I still have the coin in a pot! Interesting souvenirs!

1．The accident happened when I played on ______．

A．my bed

B．my elder brother's waterbed

C．my parents' bed    

D．my little brother's waterbed

2．I was choke on the coin because ______．

A．the waterbed started moving

B．the waterbed stopped moving

C．the door started moving

D．I was very excited

3．______ came to help me first．

A．My mother

B．My brother

C．My father

D．The doctor

4．According to the passage, which of the following is right?

A．The story happened when the girl was ten years old．

B．The strong cough made the girl swallow the coin in the end!

C．They called the hospital and the doctors took her to hospital．

D．Her family and friends have enjoyed calling her "Piggy Bank" after that．

5．What's the best title of the passage?

A．A little girl．

B．A coin．

C．Waterbed．

D．Embarrassing experience．

设N_A为阿伏加德罗常数的数值，下列说法中正确的是

A．1mol Fe²⁺与足量的H₂O₂溶液反应，转移2n_A个电子

B．标准状况下，22.4L NO₂气体中含有N_A个O₂分子

C．常温常压下，15g HCHO含有2N_A对共用电子对

D．1L 0.1mol•L^－1的醋酸溶液中有N_A个CH₃COO^－

监理工程师在收到承包单位的隐蔽工程检验申请后，首先对质量证明资料进行审查，并在合同规定的时间内到现场检查，此时，( )应随同一起到现场。

A．建设单位代表
B．项目技术负责人
C．设计单位代表
D．承包方专职质检员和相关施工人员

社会主义法制的核心是（）

A．有法可依

B．有法必依

C．执法必严

D．违法必究

报备受理行应下达报备反馈意见的工作时限是（）。

A.3个工作日内

B.4个工作日内

C.5个工作日内

D.6个工作日内