皮皮学，免费搜题
登录
搜题
【单选题】
他励直流电动机要多次启动和停止，注意每次启动直流电动机时，都要将励磁调节电阻Rpf调至最小，( )调至最大；先接通励磁电源开关，再接通电枢电源开关。A.
励磁电源开关
B.
励磁调节电阻Rpf
C.
电枢电源开关
D.
电枢调节电阻Rpa
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】In which country do children own mobile phones at a younger age?
A.
Denmark
B.
America
C.
Korea
D.
Italy
【单选题】In which country do people get married around age 25?
A.
Colombia
B.
Argentina
C.
Japan
D.
Brazil
【单选题】In which country do the fewest workers take their alloted holiday days?
A.
China
B.
Japan
C.
Australia
D.
South Africa
E.
South Korea
F.
United States
G.
Canada
【单选题】In which country do men sometimes pat each other on the back?
A.
The Philippines.
B.
Finland.
C.
Korea.
D.
The United States.
【单选题】In which country do people prefer the side-to- side arrangement in formal situations?
A.
Britain
B.
German
C.
Brazil
D.
China
【单选题】In which country do the workers work more hours?
A.
Japan
B.
Australia
C.
United States
D.
Canada
【单选题】The author is primarily concerned with ______.
A.
condemning the U.S. for its failure to provide better medical care to the poor
B.
evaluating the relative significance of factors contributing to the poor health status in the U.S.
C.
providing information that the reader can use to improve his or her personal health
D.
advocating specific measures designed to improve the health of the U, S. population.
【单选题】The author is primarily concerned with ______.
A.
condemning the U.S. for its failure to provide better medical care to the poor
B.
evaluating the relative significance of factors contributing to the poor health status in the U. S.
C.
comparing the general health of the U.S. population with world averages
D.
advocating specific measures designed to improve the health of the U.S. population
相关题目：
参考解析：
知识点：
题目纠错 0
发布
