主藏精的脏器为（） A.肺 B.脾 C.肾 D.肝 E.心

计算机中，执行一条指令所需要的时间称为指令周期，完成一项基本操作所需要的时间称为机器周期，时钟脉冲的重复周期称为时钟周期。因此，（）。

A．时钟周期大于机器周期

B．时钟周期等于机器周期

C．机器周期大于指令周期

D．指令周期大于时钟周期

严重胃溃疡患者不宜使用

A．氢氧化铝

B．氢氧化镁

C．三硅酸镁

D．碳酸钙

E．雷尼替丁

某有奖储蓄每开户定额为60元，按规定，1万个户头中，头等奖1个为500元，二等奖10个每个为100元，三等奖100个每个为10元，四等奖1000个每个为2元。某人买了5个户头，他得奖的期望值是：（）

A.2.20

B.2.25

C.2.30

D.2.45

Her frozen fingers touched the flame trying to feel alive. She could feel the warmth but it was a cold heat, as if the candle was rejecting her.

Her arms turned red because of the cold, her short sleeved shirt not giving her enough warmth. The winter air grabbed(抓住) at her arms, causing her pain, but she didn’t mind. She knew she should put her jacket on, it was winter in Connecticut, but that would be giving up. Up here, in this tree she felt safe.

She looked at the candle, surrounded by hardening wax(蜡). She placed her fingers gently on the warm green wax. This candle was a reminder of her life inside that house, a life she would have to return to eventually.

As a child, she had gotten this candle. She spent all she had on it. The beautiful crystal box （水晶盒）had caught her eye. Five whole nickels（五分币） had brought her that candle.

She gave it to her mother for Mother’s Day. Her mother had managed a smile and put it on a shelf. “It’s very pretty, honey! I will put it right here.” Since then that candle had never been moved, never been lighted, sitting dusty on a cluttered shelf that no one could see. Later on, her parents got divorced.

By now the candle was colder than the air and the darkness was complete. The snow on the ground made the night lighter and less satisfying than it had been before the first snowfall. She liked the darkness because she felt safe in it. From the glances of her friends who liked the girl she used to be. From the boys who could never figure out who she was. From her guidance counselor(顾问) whose endless worried looks never made her feel any better.

No one was outside at this time of night. She was alone in the world, just how she liked it. Just as she was about to lean back against the branch, she heard a sound.

She heard footsteps breaking the ice in the snow, heading toward her. He was making his way toward the white fence at the edge of the building, right against the road. Normally she would have ignored this person and stayed on her branch faraway from human contact, but this figure had something with him. He trudged(吃力地走) toward the white fence carrying a case. The figure reached the fence, opened the case and took out a shiny object.

She took her eyes off this figure only long enough to climb down the tree to get a better view of him. She reached the bottom and saw that the person had turned to face the street, sitting on the white fence that she and her friends once sat on. She stepped carefully on the ice, making her way toward him.

And then a beautiful sound of music came from the shiny object. She stopped and listened to it. She started walking towards the guy again. Just as she was about to step onto the snow banks, she slipped on the ice crashing to the ground. The figure turned around in surprise and a sudden recognition fell upon them both.

小题1:The girl was hiding in the tree at deep night to ______.

A．keep herself from the cold

B．wait for the boy to come

C．want to be left alone

D．seek safety from any hurt小题2:From the story, we can learn that ______.

A．the girl suffered a lot in her life

B．the girl’s parents divorced because of her

C．teachers and friends treated the girl badly

D．the girl used to stay in the tree when feeling sad小题3:The underlined word “it” in the story refers to ______.

A．leaning back against the branch

B．being alone in the world

C．not being disturbed at night

D．it being dark with snow around小题4:From the end of the story, it can be known that the girl _______.

A．knew the person

B．knew what the object was

C．realized her wishes

D．would never feel alone any more

测量中常常使用参照点，这些参照点往往是认为确定的，并随参照标准的变化而变化。