EDA技术在进入21世纪后,得到更大的发展,突出表现在哪些方面?

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问题:

EDA技术在进入21世纪后,得到更大的发展,突出表现在哪些方面?

考点:电子与通信技术EDA技术EDA技术题库
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阅读填空 。
     Jack Brown is very fat. His wife is worried about his health. "It's not good for your health. You should
see the doctor and ask him how to lose weight (重量)," she tells him. "OK," answers Jack.
     He goes to see his doctor. The  doctor weighs  him.  Then the  doctor  says,  "You are 90 kilograms
heavy. It's very bad. You must lose about 20  kilograms. "  "Oh, what should I do, Doctor?" Mr Brown
asks in surprise. "You should eat only fruit and vegetables. You must run 5 kilometers a day for the next
100 days. Then call and tell me how much you weigh," the doctor says.
     Jack goes home and does what the doctor has told him. One hundred days later, he calls the doctor.
"Jack Brown here, Doctor," he says, "I'm calling to tell you about my weight. I have  lost  20 kilograms. " 
 " Great,"  says the doctor.  "Yes, but there's  a  problem," Jack says.   "I'm 500  kilometers away from
home. I don't know how  to get back ! "
     Jack Brown goes to see his   l   because he is very fat. The doctor says he is too    2  . He tells Jack
to eat   3     and  vegetables and to run for  100 days. Jack does these things. A hundred days later. he
  4  . the doctor and tells him he has lost 20 kilograms, but he is very 5   from home.
1.     2.     3.       4.          5        
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躁狂发作急性期治疗,为了快速控制急性期病情,首选()

A.锂盐

B.氯丙嗪或氟哌啶醇肌内注射

C.地西泮注射

D.卡马西平

E.丙戊酸钠

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生产一个零件,小张用
1
6
小时,小赵用
1
5
小时,小赵的和小张的工作效率比是6:5.______.
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试题二(共15分)阅读以下关于AD574(12位的A/D转换器)的叙述,回答问题1至问题3,将答案填入答题纸的对应栏内。【说明】AD574可以通过简单的三态门、锁存器接口与微机系统的系统总线相连接,也可以通过可编程接口(如8255)与系统总线相连接。由表2-1可知,AD574可以工作在8位,也可以工作在12位。图2-1为以8255为接口芯片,将工作于12位下的AD574接到8位ISA系统总线上。

【问题1】(3分)在图2-1中,通过8255的A0、Al口地址选择信号线进行PA口、PB口、PC口的控制。回答下列问题,将答案填写在答题纸对应的栏目中。(1)A0为0,Al为0时控制(1)口;(2)A0为0,Al为1时控制(2)口;(3)A0为1,Al为0时控制(3)口。

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停炉冷却过程中汽包上下壁温差不超过(),否则应降低()。

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