问题 多项选择题

以下对于钢筋弯曲和弯钩描述正确的有()

A.钢筋弯曲后,弯曲处内皮收缩、外皮延伸、轴线长度不变,弯曲处形成圆弧,弯起后尺寸不大于下料尺寸,应考虑弯曲调整值

B.钢筋弯心直径为2.5d,平直部分为3d

C.钢筋弯心直径为3.5d,平直部分为5d

D.钢筋弯钩增加长度的理论计算值:对转半圆弯钩为6.25d,对直弯钩为3.5d,对斜弯钩为4.9d

E.钢筋弯钩增加长度的理论计算值:对转半圆弯钩为7.25d,对直弯钩为4.5d,对斜弯钩为4.9d

答案

参考答案:A, B, D

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     This is the 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.

                                                                         Children's Home

     We DON T want your money, but children's toys, books, and clothes IN COOD CONDIT10N

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 find a little money? We use a very old kitchen, and we need some new sauce pans. Money for new

ones would be most welcome indeed,

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

                                                                    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 The Night Shelter.

1. Reading the passage, you might like to help these organizations while working 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 go to        .   

A. Street Food

B. The Night Shelter

C. Children's Home

D. Children's Hospice

3. We can infer that           .   

A. there are too many social problems in this country

B. people are very poor during the time for giving

C. warm-hearted people like to give away money

D. this passage is taken from a local newspaper

4. If your child has grown up, you may take the child's thing to      

A. Children's Home and Children's Hospice

B. The Night Shelter and Children's Home

C. Children's Hospice and The Night Shelter

D. Street Food and The Night Shelter