当任意供者的血小板输注无效时，改输何种相配的血小板（） A.HLA配型 B.HHA配

阅读短文选择正确答案。

Hello, friends!

      My name is Zhou Dan. I'm a Chinese girl. I'm twelve. I'm from Zhengzhou, China. Do you know

Zhengzhou? It's in the middle of China. I'm in No. 8 primary school. There are about nine hundred students

and fifty teachers in our school. It is a good school in Zhengzhou. I'm in Class 2, Grade Six. There are 49

students in our class: 29 girls and 20 boys. My English teacher is Miss Zhao Dan. Our names are almost

(差不多) the same, right? She is nice to me. We're good friends. I like English, and I like music, too. I want

to find a pen-friend. Please write to me.

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　Yours,

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　 Zhou Dan

1. Who is Zhou Dan?

A. She is a student.

B. She is an English teacher.

2. Where does she come from?

A. She comes from Zhengzhou.

B. She come from Zhengzhou.

3. Is Miss Zhao her Chinese teacher or English teacher?

A. She is her Chinese teacher.

B. She is her English teacher.

4. What does Zhou Dan like?

A. She likes English.

B. She likes English and music.

5. What does " pen-friend " mean (意思是)? And do you have a pen-friend?

______________________________________________________________________________

替代品是指那些与本行业的（）有同样功能的其？

A、水平

B、产品

C、价格

D、收益

教学有哪些任务

A、B、C、D四种物质之间有如下转换关系：

若A为单质，D为蓝色沉淀，则C为______，D为______（填化学式）；B→A的化学方程式为______．

制粉系统应首先保证润滑油系统的正常，油泵出，入口应开启油箱油位为油箱高度的（）为宜。

A.1/2

B.1/3

C.1/4

D.1/5