果糖胺反映取血前血糖水平的时间是 A．瞬时 B．1～2周 C．2～3周 D．3～4周

煮沸消毒时，将碳酸氢钠加入水中的作用（）

A.增强杀菌作用

B.去污防锈

C.防止橡胶类物品老化

D.防止玻璃器皿破裂

E.缩短煮沸时间

关于医院感染的概念是（）

A.医院感染就是医院交叉感染

B.医院感染研究的主要对象是住院病人

C.医院感染不包括病人入院前已获得的感染

D.医院感染分为外源性感染和内源性感染两大类

E.医院感染不包括病人入院时已处于潜伏期的感染

It all started at the beginning of this term. At first, Carmen wasn’t really sure what was happening. In class, she had to squint (眯眼) to see the blackboard clearly. As it got worse, she became more and more worried. It was important for her to see the notes and homework the teacher wrote on the board.

In class, she asked for a desk that was closer to the blackboard. One day, her teacher said, “Carmen, I’ve noticed you squinting a lot. Are you having trouble seeing the board?” Carmen shook her head. “I’m fine, Mrs. Cruz.”

At home, she had to sit closer and closer to the television. Her mother noticed her squinting as she watched her favorite shows.

“Tomorrow I will go to see a doctor,” she said firmly. Three days later, Carmen had new glasses. She was told to wear them all the time. “All of the kids at school will think I am a nerd (书呆子)，” she said. “You look just as beautiful with those glasses on as you do without them,” her mother said. But Carmen didn’t believe her.

The next day, Carmen kept the glasses in her pocket as she walked into the schoolyard. Suddenly, she heard her friend Theresa shout. “What’s wrong?” she asked.

“My silver ring is gone!” Theresa cried. Carmen could tell that Theresa was very upset. They all looked for the ring in the grassy area of the playground.

Carmen realized that she could search better if she could see better. She took the glasses out of her pocket and put them on. Everything looked so different! So clear! And a glimmer (微光) of silver caught her eye.

“Here it is,” she shouted. “Thanks Carmen,” Theresa said. “I didn’t know you wore glasses. They look great!” “Thanks,” Carmen replied shyly.

As they walked back toward the school building, two more girls praised her glasses. Carmen smiled. “Maybe wearing glasses won’t be so bad after all,” she thought.

小题1:According to the text, Carmen_________.

A．doesn’t like doing homework

B．often tells lies to her teacher

C．cares how well she does in lesson

D．has trouble getting along with her classmates小题2:When Carmen wore glasses for the first time, she felt________.

A．sad

B．pleased

C．surprised

D．disappointed小题3:What can we infer from the last two paragraphs?

A．Other girls expect to have new glasses.

B．Carmen will get used to wearing glasses.

C．Wearing glasses will make Carmen look beautiful.

D．Carmen hopes to receive more comments on her glasses.小题4:The purpose of the text is to tell readers__________.

A．how to protect their eyes

B．never to make fun of others

C．things aren’t always as bad as we expect

D．it is necessary to give a hand to those in trouble

Please bring the dictionary ______ I lent you last week.     [ ]

A. which

B. it  

C. who  

D. what

液压缸按液压系统的作用性质，可分为（）式液压缸和双作用式液压缸。

A、直线往复式

B、摆动式

C、单作用式

D、柱塞式