MAO是A．最大胃酸分泌量 B．基础胃酸分泌量 C．高峰胃酸分泌量 D．胃蛋白酶 E

A、B、C都是金属，A和C分别放入同浓度的稀硫酸中，A的反应速率比C快，A与B和硫酸铜溶液组成原电池时，A的质量增加。A、B、C三种金属的活动性顺序为（   ）

A．A>B>C        B．A>C>B        C．B>A>C        D．C>A>B

阅读理解。

     In my profession as an educator and health care provider, I have worked with numerous children infected

with the virus that causes AIDS. The relationships that I have had with these special kids have been gifts in my

life. They have taught me so many things, but I have especially learned that great courage can be found in the

smallest of packages. Let me tell you about Tyler.

     Tyler was born infected with HIV: his mother was also infected. From the very beginning of his life, he

was dependent on medications to enable him to survive. When he was five, he had a tube surgically inserted

in a vein in his chest. This tube was connected to a pump, which he carried in a small backpack on his back.

Medications were hooked up to this pump and were continuously supplied through this tube to his bloodstream.

At times, he also needed supplemented oxygen to support his breathing.

     Tyler wasn't willing to give up one single moment of his childhood to this deadly disease. It was not unusual

to find him playing and racing around his backyard, wearing his medicine - laden backpack and dragging his

tank of oxygen behind him in his little wagon. All of us who knew Tyler marveled at his pure joy in being alive

and the energy it gave him. Tyler's mom often teased him by telling him that he moved so fast she needed to

dress him in red. That way, when she peered through the window to check on him playing in the yard, she

could quickly spot him.

     This dreaded disease eventually wore down even the likes of a little dynamo like Tyler. He grew quite ill and,

unfortunately, so did his HIV-infected mother. When it became apparent that he wasn't going to survive, Tyler's

mom talked to him about death. She comforted him by telling Tyler that she was dying too, and that she would

be with him soon in heaven.

     A few days before his death, Tyler beckoned me over to his hospital bed and whispered, "I might die soon.

I'm not scared. When I die, please dress me in red. Mom promised she's coming to heaven, too. I'll be playing

when she gets there, and I want to make sure she can find me."

1. What is the boy Tyler's attitude towards death? [ ]

A. optimistic.

B. pessimistic.

C. sorrowful.

D. fearful.

2. Tyler requested the writer to dress him in red when he died simply because _____. [ ]

A. red is a lucky color

B. red might help to cure him

C. his mom could spot him easily

D. he could find more mates by wearing red

3. Which of the following might serve as a possible title for this passage? [ ]

A. My unusual profession.

B. A caring mother.

C. Mother and son.

D. Dying in red.

4. The underlined word dynamo in the fourth paragraph here means _____. [ ]

A. a promising and helpful youth

B. an extremely energetic person

C. a rare and beautiful flower

D. a magic and understanding superstar

铜及铜合金管的连接方式有（）。

A．螺纹连接

B．焊接

C．法兰连接

D．胀接

拍卖市场准入及退出的监管机构

每个URA所管辖的小区数最大限制不超过（）个。