问题 判断题

变电所的直流母线都设有可切换的直流绝缘检测装置,即用直流电压表分别测量母线正对地、负对地的电压,要求电压表计有较高的内阻,用于测量220V回路的电压表内阻不小于30千欧,测量110V回路的电压表内阻不小于10千欧

答案

参考答案:错

解析:

知识点:各种规程

问答题 简答题
阅读理解

Welcome to enj oy the Mattaponi powwow(meeting oi North America Indians)and culture day!

Created in Virginia,America,the Mattaponi Indian Museum sits on a cliff(悬崖)overlooking the Mattaponi River.The Matta—ponis have worked hard to keep their ancient way of life,customs and ceremonies. One purpose of their yearly powwow is to share these traditions with you.

MATTAPONI POWWOW AND CULTURE DAY:May 18

ADMISSION:Adult—$6.00  Children(under 12)—Free

Come and spend the day with us on the shores of the Mattaponi River for an educational experience presenting the customs and beliefs of the Mattaponi.During this special day,American Indians will dance and play drums while dressed in tribal clothing.This year visitors may join in the dancing and trumming.Visitors will be able to observe artists and craftsmen(工匠)as they show their basket-making and tool-making skills.American storytellers will help you see how their habits and beliefs are passed on to their children through stories.

Enjoy Activities

●Taste American Indian foods

●Purchase crafts and souvenirs

●Play American Indian children’s games

●Watch ceremonial dances and listen to ceremonial songs

Important Cautions

●No pets

●Bring your own chairs and blankets

●Tickets may be purchased in advance although no refunds(退款)will be allowed

For more information,please visit http: //www.hemattaponireservation.com/main.

小题1:According to the text,the Mattaponis’habits and beliefs are handed down from generation to generation through      .

A.songs

B.stories

C.crafts

D.dance小题2:Visitors coming to enjoy the Mattaponi powwow and culture day can do all the following EXCEPT       

A.enjoy American Indian foods

B.watch ceremonlal dances

C.play American Indian children’s games

D.get crafts and souvenirs for free小题3:This text is mainly intended to       

A.inform readers about an event

B.persuade readers to try drumming

C.sell crafts and souvenirs to readers

D.educate readers on different types of powwows