堤坝发生管涌险情的原因有哪些？

The nurse in the substance abuse unit is trying to encourage a client to attend Alcoholics Anonymous (AA) meetings. When the client asks the nurse what he must do to become a member, which of the following the best response from the nurse

A. "Admit you’re powerless over alcohol and that you need help. "
B. "You must bring along a friend who will support you. "
C. "You must first stop drinking. "
D. "Your physician must refer you to this program. "

维生素A缺乏病中眼部损害的症状包括以下内容，除外（）。

A.双眼暗适应能力差，出现夜盲症

B.角膜失去光泽，视力下降

C.巩膜出现毕脱斑

D.是维生素A缺乏病中最早出现的症状

E.严重时可出现角膜溃疡，穿孔，导致失明

阅读理解

     The summer I was ten, my mother decided to bring us to the world of art. My brother and I were not

very excited when we realized what my mother meant. What she meant was not that we could take

drawing classes or painting classes but that we would have to spend one afternoon a week with her at

the Fine Arts Museum. Before each visit to the museum, she made us read about artists and painting

styles(风格). It was almost as bad as being in school. Who wants to spend the summer thinking about

artists when you could be with your friends at the swimming pool?

     First we had to read about ancient Egyptians(古埃及人) and their strange way of painting faces and

then go to look at them at the museum. My 12-year-old brother thought this was so funny, but I was not

interested. Later we had to learn about artists in the Middle Ages who painted people wearing strange

long clothing. We had to look at pictures of fat babies with wings and curly (鬈曲的) hair and with no

clothes on flying around the edges of paintings. I certainly couldn't see what was so great about art.

     On our last visit to the museum, something happened when I saw a painting by a woman called Mary.

In it, a woman was reading to a child. The colors were soft and gentle, and you could tell by the mother' s expression how happy she was just to be with the child. I couldn't stop looking at this painting ! I wanted

to see every painting Mary had ever made! It was really worth looking at so many paintings to find a

painter who could interest me so much.

1. The aim of the mother' s plan was to _________.

A. take them to visit the museum        

B. introduce them to the world of art

C. ask them to read about artists          

D. show them different painting styles

2. What was the writer' s experience in the museum before the last visit?

A. She came to feel her mother' s love.

B. She liked many paintings.

C. She hardly enjoyed herself.            

D. She could understand the pictures of fat babies.

3. What made the writer go through a change that summer?

A. One of Mary's paintings.              

B. A strange way of painting.

C. Artists in the Middle Ages.            

D. Her mother' s instruction.

4. From the text, we can see _________.

A. the importance of curiosity            

B. the effect of art

C. the value of learning                      

D. the power of family education

阻断传染病传播途径所采取的防疫措施包括()

A．及时隔离患者

B．做好环境卫生

C．消灭媒介昆虫

D．按时预防接种

E．讲究饮食卫生

急性CO中毒，下列哪项治疗是错误的（）

A.脱离现场、转移到空气新鲜的地方

B.鼻管吸氧、严重者高压氧舱疗法

C.防治肺水肿

D.控制高热

E.首先注射苏醒剂