空气分离器的作用是：为了分离和清除制冷系统中的（），保证保证制冷系统安全运行。A.空

     If you have no special plans for your holidays, why not be a volunteer with us? Being a volunteer, you don’t think only of         . You work, and you don’t get money.         your helping hands can make both others and yourself happy. More and more young people are ready to           us. Let’s share some of their stories and plans.

Mary, 17

I visited the forest park with Mr Cao last week. I found there were not enough         there. I’m going to help the Forest Centre build new hiking paths in the mountains. It’s going to be great           —I’ll spend seven days living in a forest and enjoying the clean mountain air. I’m going to           with friends in the day and then sleep under the moon and stars. It will be a nice sport, and I’ll be able to do         good at the same time.

Andy, 18

This summer, I’m going to volunteer with Loving Pets Program. I         my neighbours’ pets last summer. And I fell in love with dogs and cats. This summer, I will work in the         centre and         my kindness and love to more pets. I am sure to make friends with more       !

Haitao, 16

Some children find reading         . They have problems with reading. They need our help. I’ll work for a       called Reading for Life. Every day, I’m going to help them choose and read books            they like. I want to be a          when I grow up, and I love children and reading, so this experience will help me in many ways.

中长期公司贷款业务中，以（）居多。

A.流动资金贷款

B.房地产贷款

C.项目贷款

D.银团贷款

重29.4N的铜块，能否用最大称量是500g的天平称它的质量?

导致外商投资企业投资者股权变更的原因，主要包括( )等。

A．外商投资企业投资者之间协议转让股权

B．外商投资企业投资者经其他各方投资者同意向其关联企业或其他受让人转让股权

C．外商投资企业投资者协议调整企业注册资本导致变更各方投资者股权

D．外商投资企业投资者经其他各方投资者同意将其股权质押给债权人，质权人或受益人依照法律规定和合同约定取得该投资者股权

酸值测定用95%乙醇起什么作用？