问题 选择题

下列说法不正确的是

A.炔烃的官能团为-C≡C-

B.乙烯的结构简式为CH2CH2

C.在铁制品上镀铜时用金属铜作阳极

D.用Na2S做沉淀剂除去废水中的Cu2+和Hg2+

答案

答案:B

题目分析:A、炔烃分子中含有碳碳三键,因此炔烃官能团的结构式为-C≡C-,A正确;B、乙烯的结构简式为CH2=CH2,B不正确;C、电镀时待镀金属作阴极,与电源的负极相连。镀层金属作阳极,与电源的正极相连,所以在铁制品上镀铜时用金属铜作阳极,C正确;D、CuS与HgS都是不溶于水的沉淀,因此用Na2S做沉淀剂除去废水中的Cu2+和Hg2+,D正确,答案选B。

阅读理解

Volunteers, as an essential part of a successful world exposition, are a major channel for the public to join in, serve and share the world exposition and a means to show the image of the host country and city. The following information is about the volunteer for the World Exposition 2010 Shanghai China.

I.Basic Requirements for Volunteers

● Be willing to join in voluntary services of Expo 2010;

● Age limit: Expo Site volunteers must be born before April 30, 1992 and Expo City Voluntary 

Service Station volunteers before April 30, 1994;

● Obey the laws and regulations of the PRC;

● Be able to participate in training and relevant activities before the opening of Expo 2010;

● Have necessary knowledge and skills needed by the position;

● Be in good health to meet the requirements of voluntary positions.

II.Further Information for Volunteers

● Source

Residents of Chinese mainland, Hong Kong, Macau and Taiwan, as well as overseas Chinese, and foreigners can all apply to be the volunteers.

● Signup methods

Applicants may log in onto the official websites for online signup.They may also consult or connect with the Expo Volunteer Stations.

● Time

May 1 - December 31, 2009

III.Volunteer Training

Volunteer training includes general training, special training and position training.General training is carried out through internet, while special training and position training are provided through classroom lectures and field practice.

IV.Volunteer Types

● Expo Site volunteers refer to those offering voluntary services to visitors and the Organizer in   the Expo Site, mainly including information, visitor flow management, reception, translation and interpretation, assistance for the disabled, and assistance in media service, event and conference organization and volunteer management.

● Information booth volunteers are stationed in the Expo's information booths at key transportation centers, commercial outlets, tourist attractions, restaurants, hotels and cultural event places outside the Expo Site.They offer services including information, translation, interpretation and even first aid.

小题1:If you were born in April 1993, where can you be a volunteer

A.In the Expo City.

B.In the host country.

C.In the Expo Site.

D.In Chinese mainland小题2:Which of the training will be done on the Internet

A.Position training.

B.General training.

C.Classroom training.

D.Special training.小题3:Which of the following service is offered by information booth volunteers?

A.Visitor flow management.

B.Helping the disabled

C.Assistance in media service.

D.Emergency First aid.

问答题 简答题