设备工程项目每个参与方组织内部都存在( )种信息流。A．2 B．3 C．4 D．5

Because the writer fell ill all of a sudden, the novel _____________ by the end of next month was put off.

A．being published

B．will be published

C．to be published

D．published

如图所示，甲、乙、丙三个轮子依靠摩擦传动，相互之间不打滑，其半径分别为r₁、r₂、r₃。若甲轮的角速度为ω₁，则丙轮的角速度为   

A．

B．

C．

D．

阅读理解。

     The cold wind cut through my enthusiasm (热情) as a tourist in Washington D.C., so I entered the

nearest restaurant for warmth. I ordered a coffee, and began observing people.

     At that time, I saw a man seated nearby and from his eager eyes, I realized that he noticed the

delicious food. His tired body and worn clothes shouted, "Homeless, homeless!"

     "How long has it been since he ate last time?" I wondered. I expected him to approach me for a

handout (施舍物). But he never did. A silent war broke out in my head-one side was telling me to mind

my own business, and the other was urging me to offer him some food.

     While my inner debate moved on, a well-dressed young couple walked up to him. "Excuse me, sir,

"the husband began. "We just finished eating, and our appetites (胃口) weren't as big as we had thought. We hate to waste good food. Can you help us out and put this to use?" He gave the man some food.

"Thank you. Merry Christmas!" the man replied. The man carefully watched his new food, and was about

to eat.

     Something that happened next shocked me. An old man in pants, an old jacket and open shoes

entered the hall and walked towards us. My neighbor saw the situation. Setting aside his meal, he stood

up and guided the old man to the table.

     "Hi, my name is Jack," he said, "and one kind person brought me this meal. I just finished eating and

hate to waste good food. Can you help me out?" The old man answered gratefully, "Sure, but only if you

go halfway with me on that sandwich."

     I left the restaurant that day feeling warmer than I had ever thought possible.

1.The author entered the nearest restaurant to         .

A. escape the coldness outside

B .taste the delicious coffee

C. relax as a tourist

D. enjoy watching other people

2. What can we learn about the old man according to the text? 

A. He accepted the food given by the kind couple.

B. He felt ashamed because of his own appearance.

C. He expressed thanks to Jack after being helped by him.

D. He had known Jack before he entered the restaurant.

3. It can be inferred from the text that          .

A. the young couple always wasted food in the restaurant

B. the old man accepted all the food given by Jack

C. Jack was disappointed that the author didn't help him

D. Jack gave the food to the old man though he was still hungry

4. What can be the best title of the text? 

A. The Couple's Kindness                

B. Drawn to the Warmth

C. A Delicious Dinner                  

D. A Homeless Man

将pH=2.00的HCl溶液与pH=13.00的NaOH溶液等体积混合后，溶液的pH值是（）。

A．7.50

B．12.65

C．3.00

D．11.00

Indians always shake (摇) their heads when they talk to others. (41) does not have the same meaning (42) "no". If someone wants to visit India, (43) should know this, (44) it will give him some trouble.
One day, a foreign officer went to India on business. He hired (雇佣) a car and an Indian to drive it. When he (45) the driver to send him to his office, the driver shook his (46) at once. The officer repeated his order, and the driver (47) so again. At last, the officer, of course, got (48) .
" (49) dare you refuse (拒绝) my order" he shouted. "Drive me to office immediately!"
The driver answered (50) quite a loud voice, too. "Yes, sir !" But he still shook his head at the same time. Suddenly the officer realized that, "No means Yes here!\

[A] it [B] She[C] That