艾滋病病毒感染者在发病前应该（）A、隔离治疗 B、正常生活和工作 C、休息和治疗

临床上测定血气分析标本采集的最常用部位是（）

A.桡静脉

B.股静脉

C.股动脉

D.肱静脉

E.颈动脉

机关，团体，企业，事业单位和其他组织的档案机构依照《档案法》的规定，该履行的职责有哪些？

My parents were in a huge argument, and 1 was really upset about it. I didn't know who I should talk with about how I was feeling. So I asked Mom to allow me to stay the night at my best friend's house. Though I knew I wouldn't tell her about my parents’ situation, I was looking forward to gelling out of the house. I was in the middle of packing up my things when suddenly the power went out in the neighborhood. Mom came to tell me that I should stay with my grandpa until the power came back on.

I was really disappointed because I felt that we did not have much to talk about. But I knew he would be frightened alone in the dark. I went to his room and told him that I'd stay with him until the power was restored. He was quite happy and said, "Great opportunity."

"What is?" I asked.

"To talk, you and I" he said. "To hold a private little meeting about what we’re going to do with your mom and dad, and what we're going to do with ourselves now that we're in the situation we are in."

"But we can't do anything about it. Grandpa," I said, surprised that here was someone with whom I could share my feelings and someone who was in the same "boat" as I was.

And that's how the most unbelievable friendship between my grandfather and me started. Sitting Acre in the dark, we talked about our feelings and fears of life — from how fast things change, to how they sometimes don't change fast enough. That night, because the power went out, I found a new friend, with whom I could safely talk about all my fears and pains, whatever they may be — suddenly, the lights all came hack on. "Well," he said, "I guess that means you'll want to go now. I really like our talk. I hope the power will go out every few nights!"

56.1 wished to get out of the house because ____

A. I was angry about my parents’ quarrel        B. I found nobody to share my feelings with

C. I wanted to escape from the dark house        D. I planned to tell my friend about my trouble

57. Grandpa was happy to see me because _____.

A. he could discuss the problem with me    B. he had not seen me for a long lime

C. he was afraid of darkness              D. he felt quite lonely

58. What can be inferred from the passage?

A. The grandchild was eager to leave.     B. They would have more chats.

C. The lights would go out again.        D. It would no longer be dark.

亲和膜色谱的缺点。

“儿童发展规划”中规定2020年包头市7岁以下儿童系统管理率达到（）以上。

A、80%

B、85%

C、90%