设函数f(x)=log2x+log2(1-x),则f(x)的定义域是______

题型:填空题

问题:

设函数f(x)=log2x+log2(1-x),则f(x)的定义域是______;f(x)的最大值是______.

考点:对数函数的解析式及定义(定义域、值域)对数函数的图象与性质
题型:填空题

大型设备基础在设备安装就位前,监理工程师应按规定程序对其进行检查,土建施工部门应提交(  )供监理工程师审查。

A.混凝土强度测试报告

B.基础预压及沉降观测记录

C.施工依据及质量控制资料

D.基础预压后的观测记录

题型:填空题

阅读理解。

     This is a time of year when we think about giving and receiving presents. Can you find a little extra

to give? On this page we suggest a few organizations you might like to help.

     Littleton Children's Home

     We DON'T want your money, but children's toys, books and clothes IN GOOD CONDITION

would be very welcome.

     Also, we are looking for friendly families who would take our children into their homes for a few

hours or days as guests. You have so much?will you share it?

Phone Sister Thomas on 55671

     Children's Hospice

     We look after a small number of very sick children. This important work needs skill and love. We

cannot continue without gifts or money to pay for more nursing staff. We also need storybooks and

toys suitable for quiet games.

     Please contact the Secretary, Little Children's Hospice, Newby Road.

     Street Food

     In the winter weather, it's no fun being homeless. It's even worse if you're hungry. We give hot food

to at least fifty people every night. It's hard work, but necessary. Can you come and help? If not, can

you offer a little money? We use a very old kitchen, and we need some new saucepans(平底锅). Money

for new ones would be most welcome indeed.

     Contact Street Food, c/o Mary's House, Elming Way. Littleton Phone 27713

     Littleton Youth Club

     Have you got an unwanted chair??a record-player??a pot of paint ? Because we can use them!

     We want to get to work on our meeting room!

     Please phone 66231 and we'll be happy to collect anything you can give us.

     Thank you!

     The Night Shelter

     We offer a warm bed for the night to anyone who has nowhere to go. We rent the former

Commercial Hotel on Green Street. Although it is not expensive, we never seem to have quite enough

money. Can you let us have a few pounds? Any amount, however small, will be such a help.

     Send it to us at 15, Green St, Littleton. Please make check payable to Night Shelter.

1. What kind of people are these organizations designed for?

A. Homeless and sick children

B. Less fortunate members of our society

C. Hungry people who have no beds to sleep in

D. Friendly members of our society to help others

2. If you like children and you could offer a happy family to a homeless child, you may contact _____.

A. Street Food      

B. The Night Shelter  

C. Littleton Children's Home      

D. Children's Hospice

3. What can be concluded from the passage?

A. There are too many social problems in this society.

B. People are very poor during the time of giving.

C. To offer help is just an excuse for these organizations to collect money.

D. There are many organizations trying to solve social problems.

4. What kind of things would Littleton Youth Club like to collect?

A. Old furniture and second-hand electrical equipment.

B. An apartment and some saucepans.

C. Hot food and storybooks.

D. A sum of money and children's toys.  

题型:填空题

斜巷中部各甩车场必须安装常闭式挡车栏。

题型:填空题

已知A点的标高为3.256m,水准尺测量中,A、B两点的水准尺读数为1153mm与1153mm,则B点的标高为______。

A.3.256m

B.3.456m

C.3.056m

D.±0.000m

题型:填空题

AlternativemRNAprocessingmRNA选择性加工

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