对单元机组，正常运行时，汽轮机负荷增加，锅炉运行工况不变，分析哪些测量值发生变化？

2009年1月26日（大年初一），部分地区出现奇妙天象——日环食，中国南方地区可看到日偏食。下次想在春节观看日食，就要再等38年。之所以会发生日环食，是因为今年1月26日15时55分（朔），太阳、月球和地球排成一条直线而发生日食；又因为当天月球距离地球较远，而太阳距离地球较近，月球的视圆面较小而不能全部遮掩太阳，因而发生日环食。这个事例表明

①客观性是事物的根本属性      ②意识能够正确地反映客观事物

③静止是暂时的、绝对的        ④规律是客观的，人们能够认识规律

A．①②

B．③④

C．①③

D．②④

传播材料的设计制作首先要确定的是（）

A.传播资料

B.传播方法

C.传播项目

D.传播目的

E.传播信息

阅读理解。

Upcoming Kids & Youth Events

The Race to Space

Date: February 27, 2012

Does life exist in outer space? How can we tell? In 1970 the first robot landed on the moon, and then,

scientists have created different kinds of machines to move around planets to help us answer our space

question. Come learn more about their interesting history.

Fee: $10 for adults and children over 1 year old. Under 1 year old FREE. $9 for older people.

Museum Hours: Tuesday through Sunday, 10:00am ~ 7:00pm. Closed Monday.

Where: Long Island Children's Museum, 11 Davis Ave, Garden City, NY

Learn and Play

Date: February 28~March 2, 2012

Fun at the farm for preschoolers. Programs by Cornell Cooperative Extension educators are parent-child

interactive (互动的). Includes story, snack and animal visits. Ages 24~60 months.

Two periods available: 10:30 am~11:30 am or 1:00 pm~ 2:00 pm. $10 per child. Please call or visit our

website for additional information.

Where: Suffolk Country Farm and Education Center, 350 Yaphank Ave (County Road 21), Yaphank,

NY

Arctic Animals for Preschoolers

Date: March 13, 2012

Time: 10:00am~12:00 noon

Explore the frozen world of creatures that call the Arctic and Antarctic home with a Cornell Cooperative

Extension educator. How do they do it? Prepare warm clothes.

Ages 3~5 (with an adult). $25 per child (includes one adult, each additional adult $ 5)

Where: Sport Fishing Education Center, Ocean Parkway, Babylon, NY

Usdan Center Open House

Date: March 31, 2012

Time: 11:00am~2:00pm

Usdan Center for the Creative and Performing Arts, one of America's largest not-for-profit(非盈利的)

summer arts camps, named a "Best Of for 2010", is now preparing for its 44th season, FREE admission.

Open houses will give students and their families a chance to tour the center and get information on Usdan's more than 40 programs - including music, dance, theater, writing, nature and chess.

Where: 185 Colonial Springs Road, Wheatley Heights, NY

1. How much does it cost if your grandparents bring you to Children's Museum after school?

A. $29.          

B. $28.          

C. $18.          

D. $10.

2. In what way do you learn and play in Suffolk County Farm and Education Center?

A. Parents and children work together.      

B. Children are asked to work on the farm.

C. Animals can be taken home to be raised.  

D. Educators lead children to visit the farm.

3. What is the special feature of Sudan Center Open House?

A. You may go there all day.          

B. You need register in advance.

C. You can go to the camp for free.    

D. You are asked to show your art talent.

4. On Monday, you cannot go to          .

A. Usdan Center Open House                

B. Sport Fishing Education Center

C. Suffolk County Farm and Education Center    

D. Long Island Children's Museum

5. We can learn from the events that         .

A. the events last from February to May

B. children should be with at least two adults

C. visiting Sport Fishing Education Center, you must prepare warm clothes

D. you can learn space knowledge in Usdan Center Open House

县委《关于严禁婚丧喜庆大操大办的暂行规定》（罗委［2000］39号）规定，党政机关、企事业单位党员、干部、职工个人及亲属婚丧喜庆筹办酒席的，实行（）制度。

A、自行办理

B、无需审批

C、大操大办

D、申报审批

正线上必须采用交分道岔时，其辙叉号数不得小于（）号。

A.9

B.12

C.18

D.30