下列哪种毛细血管仅由一层内皮细胞组成（） A.微动脉 B.前毛细胞血管 C.真毛细血

顺次连接等腰梯形各边中点所得的四边形是______．

有关脉管系的组成，正确的是（）

A.由心、动脉、毛细血管和静脉组成

B.由血管和淋巴系组成

C.由心、动脉、静脉和淋巴管组成

D.由心血管系统和淋巴系统组成

E.以上都不正确

Jodie’s Daddy Is a Garbageman(垃圾清理工)

Mr Swales wanted to find out what his students’ parents did. He had just called Jodie when some girls burst out laughing. Shirley shouted, “Jodie’s daddy is a garbageman!”

Everybody in the class laughed out loud, except Jodie. She felt her face turn red.

“Silence!” Mr Swales said, “Being a garbagemen is a difficult and useful job. We should all be grateful to Jodie’s father.”

Jodie’s father came to walk her home from school as usual, but she didn’t run up to him the way she always did. When they got back home, Jodie went to her room and cried for a long time.

Her father came into her room, “What happened, Jodie? Why are you so sad?”

Jodie told her father what had happened and looked at him. He didn’t seem angry or hurt. “Well,” he said, “they are right. Being a garbageman is a dirty job. Tomorrow’s Saturday. Come to work with me, Jodie.”

The place really smelt too bad. Jodie wrinkled her nose. “Don’t worry, kid. In five minute you won’t smell a thing.” said her father.

Everybody there was working hard, and they seemed to have a good time. Jodie’s father handed her a pair of gloves and told her to get the little plastic bags and throw them into the truck.

It was fun, but also hard work. Jodie’s arms soon got tired. At last, no more garbage was left and Jodie felt very happy.

“Garbage is disgusting, but when we clear it away, everything’s nice and clean. You can make yourself happy only by making other happy. That’s why I like being a garbageman so much.”

Jodie gave her dirty, smelly garbageman daddy a big kiss(吻). She said, “When I grow up, I will be a garbage-girl!”

Now whenever someone asks Jodie what her daddy does, she says, “He’s a garbageman! Everybody makes garbage, but my daddy takes it away!”

小题1:What happened in Mr Swale’s class?

A．He wanted to showwhat job was the most useful.

B．He asked an improper (不适宜的）question.

C．Jodie gave an honest answer.

D．The other students laughed at Jodie.小题2:Which of the following is Not True according to this story?

A．She didn’t run up to her father the way she always did.

B．Jodie went to her room and cried for a long time after she got back home.

C．She gave her father a sweet kiss as usual.

D．Jodie told her father what had happened and had a talk with her father.小题3:Why did Jodie’s father take her to his workplace?

A．To make Jodie cool down.

B．To prove how dirty his job was.

C．To help Jodie learn about his job.

D．To keep Jodie away from her classmates.小题4:Jodie gave her father a big kiss mainly because ______.

A．he was kind

B．he was unselfish

C．he was cheerful

D．he was hardworking小题5:How does Jodie feel about her father now?

A．Sad

B．Dirty

C．Angry

D．Proud

食品中总酸的测定，通常选用的指示剂是（）。

A.酚酞

B.甲基橙

C.甲基红

D.溴甲酚绿

“狼孩”反映了个性的（）

A.社会性

B.生物性

C.个别性

D.整体性