酰基载体蛋白含有（）A、核黄素 B、叶酸 C、泛酸 D、钴胺素

My teenage son Karl became withdrawn after his father died. As a single parent, I tried to do my best to talk to him. But the more I tried , the more he pulled away. When his report card arrived during his junior year, it said that he had been absent 95 times from classes. In this way he would never graduate. I sent him to the school adviser, and I even begged him. Nothing worked.

◆ One night I was at work when I got a phone call. A man introduced himself as a head teacher. “ I want to talk to you about Karl’s absences(缺席).” Before he could say another word I choked up(哽咽). And said sadly, “ I love my son. I’ve tried everything to get Karl to go back to school and nothing has worked. It’s out of my hands.” For a moment there was silence on the other end of the line. The head teacher seriously said, “ Thank you for your time.”

◆ Karl’s next report card showed a marked improvement in his grades. He was even on the list of the best students at school. In his fourth year, I took part in a parent-teacher meeting.I noticed that his teachers were surprised at the way he had turened himself around. On our way home, he said, “ Mum, remember that call from the head teacher last year?” I nodded. “That was me. I thought I’d play a joke but I heard what you said, It really hit me how much I was hurting you.That’s when I knew I had to make you proud.”

阅读短文内容, 选择正确答案。（5分）

小题1:Which of the following has the similar meaning to the underlined word “withdrawn”?

A．Quiet and lonely.

B．Relaxed and excited.

C．Active and lively.

D．Happy and easygoing.小题2:According to the first report card, Karl __________.

A．often went to school late

B．did well at school

C．did a good job at school

D．failed in the exams小题3:When the mother said “ it’s out of my hands” to the head teacher, she meant that she __________. 

A．didn’t know what to do about her son

B．would drive her son away from the house

C．had no money to support the family

D．would have to hang up小题4:Who telephoned Karl’s mother that day?

A．The head teacher.

B．The school adviser.

C．Karl himself.

D．The passage doesn’t tell us.小题5:From the passage we can learn that __________.

A．children in single-parent families always have mental problems

B．mother’s love is important to teenagers’life

C．parents should give their children everything that they need

D．school education still works well without the support from parents

如图所示的电路为一光敏电阻自动计数器的一部分，其中R₁为光敏电阻，当照射到光敏电阻处的光被挡住时，电流表A显示的电流I和ab间电压U的变化情况是（    ）

A．I变大，U变大

B．I变小，U变小

C．I变小，U变大

D．I变大，U变小

男性，37岁。突然呕鲜血1000ml，查体：神志朦胧，巩膜黄染，腹胀，无压痛，移动性浊音阳性，血压70／48mmHg，脉搏130次／分。胃镜发现食管下端曲张静脉出血。该病人的合理治疗方案是（）。

A.急诊分流手术

B.急诊断流手术

C.三腔二囊管压迫

D.立刻应用止血药

E.先内科保守治疗，稳定后再手术

据新华社莫斯科电，经过两天的飞行，搭载首位韩国宇航员以及两名俄罗斯宇航员的飞船与国际空间站成功对接．如果对接前宇宙飞船和空间站在同一轨道上运行，若飞船与前面空间站对接，飞船为了追上空间站，可采用的方法（　　）

A．飞船在原轨道加速追上空间站，完成对接

B．飞船从原轨道减速至一个较低轨道，再加速追上空间站完成对接

C．飞船从原轨道加速至一个较高轨道，再减速追上空间站完成对接

D．无论飞船如何采取措施，均不能与空间站对接