在下列业务中不属智能网运用的是（）.A、800号业务 B、300号业务 C、IC卡

（）是在期货市场和现货市场之间建立一种盈亏对冲的机制。

A.套期保值

B.保证金制度

C.实物交割

D.发现价格

一盏标有“220V 100W”字样的白炽灯，把它接到220V的电源上时，由于与灯连接的导线过长，电阻较大，测得该灯的实际功率只有81W（假设灯丝电阻不变）．求：

（1）该灯正常发光时，灯丝的电阻是多大？

（2）与灯相连的导线上消耗的功率为多少？

有以下结构体说明和变量定义，如图所示，指针p、q、r分别指向一个链表中的三个连续结点。　　struct node　　{ int data;　　　struct node *next;　　} *p, *q, *r;　　

　　现要将q和r所指结点的先后位置交换，同时要保持链表的连续，以下错误的程序段是（ ）。

A．r-＞next=q; q-＞next=r-＞next; p-＞next=r;

B．q-＞next=r-＞next; p-＞next=r; r-＞next=q;

C．p-＞next=r; q-＞next=r-＞next; r-＞next=q;

D．q-＞next=r-＞next; r-＞next=q; p-＞next=r;

阅读理解。

     Trouve sat up on its back legs and growled (吼叫) the words, "How are you, Grandmama?" The audience

roared with laughter and clapped. Twenty-year-old Aleck gave the dog a morsel(一口) of food. His hard work

had paid off. His dog could talk!

     Aleck was fascinated with the different sounds of people's speech. His father taught students who had a

speech problem to improve their speech. Aleck paid close attention. Could an animal form sounds into words,

too? He decided to experiment with Trouve, the family dog.

     The easy part was teaching Trouve to growl whenever Aleck wanted. The little dog growled for a morsel

of food.

     Next Aleck moved the dog's "lips" as it growled. It sounded like "ma ma ma". Trouve learned quickly to

stop the growling just as Aleck's hand moved away. They practiced and practiced until the dog said "mama"

perfectly.

     Soon Aleck discovered more. If he pushed gently under the dog's jawbone (下颌骨), it made the "ga" sound.

If he pushed once and moved the dog's lips twice, he could make the dog say, "ga ma ma." With even more

practice, it sounded like "grandmama". Whenever Trouve said "grandmama", Aleck gave the dog two treats, so

Trouve loved the lessons.

     Aleck tried to teach his dog to move its tongue so that Trouve could say more words. That didn't work,

but Aleck didn't give up.

     After many hours of practice, Trouve could say, "Ow ah oo ga-ma-ma?" This sounded just like "How are

you, Grandmama?"

     Friends and neighbors traveled to see young Aleck and his amazing talking dog. Rumors spread that the dog

could speak by itself, which wasn't true. No matter how much Aleck tried, the dog was never able to move its

lips without help.

     Aleck's full name was Alexander Graham Bell. He wanted to know more about the world all his life. He had

many ideas. Some worked; others didn't. But he kept trying-always learning. One of his inventions was

something called the telephone.

1. Which of the following is TRUE of Aleck? [ ]

A. His father had an influence on him.

B. He had a talent for giving speeches.

C. He taught Trouve to talk in honor of his grandmother.

D. He carried out many experiments to improve people's speech.

2. Trouve grew fond of practicing talking because _____.[ ]

A. it liked being together with Aleck

B. it was given some food for that

C. it would like to develop its potential (潜能)

D. Aleck treated it like one of the family

3. Which of the following words can best describe Aleck? [ ]

A. Humorous.

B. Naughty.

C. Knowledgeable.

D. Curious.

4. What contributes most to Aleck's success in teaching the dog to talk? [ ]

A. His own hard work.

B. His neighbor's help.

C. His father's encouragement.

D. The dog's smartness.

5. According to the passage, how many statements are true?

    a. The audience was very excited to hear the dog growling the sound "ma".

    b. The dog could understand Aleck's sign.

    c. The dog could move its tongue successfully by itself.

    d. Aleck kept trying his ideas all the while.

    e. The only intention of Aleck's is telephone.[ ]

A. 2

B. 3

C. 4

D. 5

根据《重大危险源辨识》(GB 18218—2009)，辨识重大危险源的依据是( )。

A．物质的物理特性
B．物质的比重及数量
C．物质的密度及数量
D．物质的危险特性及数量