下面属于消防技术规范的是（）。A、《公安消防部队执勤条令》 B、《消防法》 C、《建

1949年1月，东北公安总处改为( )

A．东北公安部

B．东北公安厅

C．东北公安局

D．东北局社会部

下列物质中，在一定条件下能水解的高分子化合物是（    ）

A．肥皂

B．油脂

C．纤维素

D．氨基酸

阅读理解

     In Britain, in a population of 60 million, there are 13 million grandparents, many of whom live alone a

long way from their grandchildren.The loneliness of these older people has become an issue that schools

are trying to teach children about .

     On a popular teacher's website, there is a classroom activity to help make children aware of the

implications of the different generations of the same family living far from each other. It's a story about Mrs. Eiderdown, an elderly lady whose grandchildren have moved to Australia with their parents. She lives

alone and rarely sees her family .

     First of all, the children speculate about Mrs. Eiderdown's life.  What does she have for breakfast ?

what does she do all day ?how does she feel about her life ?

     One day, Mrs. Eiderdown decides that she wants a pet to keep her company and puts an

advertisement in a local shop window. Then she waits at home to see if anyone will answer her

advertisement .

     A tall thin man rings her doorbell. he is holding a cardboard box. Mrs. Eiderdown chats with the man

for ten minutes before she realizes that she hasn't looked in-side the box to see what the pet is. She can hear a his-sing sound. The children guess what is in the box(a snake). Mrs. Eiderdown thanks the man but

says she doesn't think the snake is a good idea .

     The next time the doorbell rings, there's a lady on the doorstep, also carrying a cardboard box.In the

bottom of the box, Mrs. Eiderdown sees something black and hairy with eight legs. Again ,the children say what they  think it is (a spider). Mrs. Eiderdown thanks the lady for her kindness but says that a spider is

not the sort of pet she has in mind.

At last, the little girl next door brings her a dog .Mrs. Eiderdown's life improves a lot because of the dog.

more importantly, of course, the little girl, whose own granny lives a long way away, starts to visit

Mrs.Eiderdown more often. This interactive classroom idea has led to a greater awareness among children about the possible loneliness of older people who live quite near them .

1.what's the main idea of the passage?

A.children get to know about the trouble of the elderly

B. neighbors help select pets for Mrs. Eiderdown

C. society helps the lonely people in the UK

D. school send pets to the lonely elderly

2.what does the underlined sentence in the third paragraph mean ?

A. they talk about how she feels about being old

B. they try to experience her loneliness

C. they try to imagine how she lives

D. they write about her life story

3.  what can we infer from the passage ?

A. the little girl often visits her own granny

B. the people who offer pets are lady's neighbors

C. the farther the elderly live ,the lonelier they feel

D. the little girl begins to care more about Mrs. Eiderdown

简述影响悬浮聚合产物粒子大小及形态的因素。

在服装缝制的过程中，熨烫工艺的主要作用有以下四个方面：原料预缩、热塑变形、定型整形、（）。