问题 多项选择题

依据GB8076标准,外加剂匀质性指标要求不超过生产厂控制值的指标有()

A.细度

B.氯离子含量

C.硫酸钠含量

D.pH值

E.总碱量

答案

参考答案:B, C, E

阅读理解

阅读理解。

    Camille Mahlknecht,9,has some big fun planned for this weekend.She and other residents of Agoura

Hills,California,plan to pick up trash during their city's annual cleanup.At the same time,Wissam Raed,12,

will be busy volunteering too.Thousands of miles away in Lebanon,Wissam plans to put on a play at an

orphanage and bring potted plants to elderly people at a senior citizen center.

    Some other children like Nathan White,10,have personal reasons for volunteering.Nathan's grandmother

died of a heart attack.To help raise money for medical research,Nathan participated in Jump Rope for

Heart.He and five other boys took turns jumping rope for two and half hours and collected more than US

$1,200 in donations for the American Heart Association.

    Millions of children around the globe lend a hand to their communities every year.Schools and parents

also contribute to the rise in youth service.For example,many schools offer community service activities for

students to join.Teachers either combine volunteer work with classroom lessons or make service work a

requirement.Parents,on the other hand,encourage their kids to volunteer and do it with them.

    Community service is particularly important in this depression time.As the need for monetary support

and other aid has increased,many charitable organizations have experienced a significant drop in donations.

Camille and other children who volunteer thousands of hours annually can fill in some of the gaps.

     According to research, kids who start  volunteering are  twice as likely  to continue doing good deeds

when they are adults.So,grab a paintbrush,a trash bag,or whatever you need to help your community.You'll

love how you feel after helping others.Even dirty work can be lots of fun,if it's for a good cause.

1.What's the writer's purpose of writing this passage?

A.To recommend youth service programs to schools.

B.To ask charity organizations to serve the community.

C.To urge children to take part in volunteering activities.

D.To propose alternatives for doing community services.

2.What is the main idea of the 3rd paragraph?

A.Community service is gaining popularity among children.

B.Families and schools help to make community service popular.

C.Children now depend more on their teachers than on their parents.

D.Nathan White had a special reason to raise money for medical research.

3.Why is community service important in a time of depression?

A.It raises money for school activities.

B.It teaches children to take care of the sick.

C.It gives charity organizations some needed help.

D.It encourages parents and teachers to work together.

4.What can be inferred from the passage?

A.Community service can help prevent juvenile delinquency(青少年犯罪).

B.Children will probably leave school and work as volunteers.

C.Organizing sports events for the school is a kind of community service.

D.Children who do volunteer work are more likely to grow up to be caring adults.

单项选择题 案例分析题