评价汽车动力特性的常用指标是（）A.加速时间 B.最大爬坡度 C.动力因数 D.最高

令牌环协议是一种

A．有冲突协议

B．随机争用协议

C．多令牌协议

D．无冲突协议

阅读理解。

     One night, as Diaz stepped off the train and onto a nearly empty platform, a teenage boy approached

and pulled out a knife.

    "He wanted my money, so I just gave him my wallet and told him, 'Here you go '" Diaz says.

     As the teen began to walk away, Diaz told him, "Hey, wait a minute. You forgot something. If you're

going to be robbing people for the rest of the night, you might as well take my coat to keep you warm."

     The robber looked at him puzzled, saying, "Why are you doing this?"

     Diaz replied, "If you're willing to risk your freedom for a few dollars, then you must really need the

money. I mean, all I wanted to do was get dinner and if you really want to join me….."

     Diaz says he and the teen went into a diner and sat in a booth.

     "The manager comes by, the dishwashers come by, the waiters come by to say hi," Diaz says.

     The kid said, "You know everybody here. Do you own this place?"

     "No, I just eat here a lot," Dias said. "But you're even nice to the dishwasher," he said.

     Diaz replied, "Well, haven't you been taught you should be nice to everybody?"

     "Yea, but I didn't think people actually behaved that way," the teen said.

     When the bill arrived, Diaz said, "You're going to have to pay for this bill because you have my

money and I can't pay for this. So if you give me my wallet back, I'll gladly treat you."

     The teen returned it immediately. "I gave him $20…I figure maybe it'll help him." Diaz says he asked

for something in return- the teen's knife-"and he gave it to me."

     Afterwards, when Diaz told his mother what happened, she said, "You're the type of kid that if

someone asked you for the time, you gave them your watch."

     "I figure, you know, if you treat people right, you can only hope that they treat you right. It's as simple

as it gets in this complicated world."

1. What did Diaz do to the teen?

A. He gave the teen a new wallet

B. He treated the teen to dinner

C. He gave his coat to the teen

D. He taught the teen a lesson

2. From the passage we can infer that the boy _______.

A. expressed his gratitude for Diaz's kindness

B. gave up the idea of robbing in the end

C. wasn't taught how to be nice to everybody

D. gave the knife to Diaz in return for his forgiveness

3. For what Diaz did, his mother showed an attitude of _______.

A. complaint          

B. concern          

C. criticism            

D. praise

4. By telling the story of Diaz, the author intends to tell us ______.

A. to keep calm in danger

B. not to go out alone at night

C. to treat others kindly

D. not to harm others on purpose

EDA的中文含义是（）。

A.电子设计自动化

B.计算机辅助计算

C.计算机辅助教学

D.计算机辅助制造

在±400kV及以上电压等级的直流线路单枀停电侧进行工作时，应穿着（）。

A.静电感应防护服

B.全套屏蔽服

C.全棉工作服

D.导电鞋