下列食品中富含维生素C的是 A．猪肉 B．鲫鱼 C．鸡蛋 D．番茄

如图7-40所示放大电路中，三极管有足够的电流放大系数，若U_CC=12V，R_B1=50kΩ，R_B2=10kΩ，R_C=1kΩ，R_E=500Ω其基极对发射极的电压V_BE=0.7V，则集电极电流I_C最接近于（）。

A．14.6mA

B．6.7mA

C．2.6mA

D．12.6mA

阅读下面短文，根据短文内容判断句子的正误。正确“A”，错误“B”。

     When I was a boy, I didn't have any hair on my head. So I was very shy. I liked to watch my friends

play in the park. Sometimes I would join them, but most of the time I just watched them play.

     Every day, we would see an old man walking in the park. He had big ears and no hair. We thought he was

dumb (哑的). Every time when my friends saw him, they would say loudly, "Hey, Mr. Dumb, what's the

time?" But they got no answer.

     One early evening, I was standing outside my house, and I saw the old man coming. I was not with any

of my friends and there were no other kids around to say the usual words of "greeting (问候)".

     But how could I let the old man walk by without saying anything? So for the first time, I asked, "Hey,

Mr. Dumb, what's the time?"

     The old man looked at me. Then he looked at his watch and answered, "It's six thirty." I ran into my

house and never said that "greeting" to the old man after that day.

( )1. The boy often played with his friends together.          

( )2. The boy's friends were very polite to the old man.       

( )3. Neither the boy nor the old man had any hair on the head.

( )4. Actually, the old man could hear and speak.              

患者男性，62岁。主因发作性左眼视物不清，右侧肢体麻木、无力伴言语不清5天，发作时言语含糊不清，右侧肢体完全不能活动，持续约5～10分钟后自行缓解，每天发作1～2次，无其他不适，发作后完全正常。既往有高血压病史20年，平素血压控制在150～170/100～110mmHg之间。查体：血压170/110mmHg，左侧颈部可闻及血管杂音，余无阳性体征。

溶栓并发症有哪些（）

A.梗死灶继发出血

B.肺部感染

C.血糖增高

D.致命的再灌注损伤和脑水肿

E.上消化道出血

F.再闭塞

　この工芸品はこわれやすいので、＿＿＿にあつかってください。

A．重要(じゅうよう)　　

B．重大(じゅうだい)　　

C．　慎重(しんちょう)　　　　

D．貴重(きちょう)　

简述预算单位根据财力可能、轻重缓急，对预算项目进行排序的原则。