皮皮学，免费搜题
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【单选题】
起动他励直流电动机时,励磁回路应( )电源。A.
与电枢回路同时接入
B.
比电枢回路先接入
C.
比电枢回路后接入
D.
以上均可
拍照语音搜题，微信中搜索"皮皮学"使用
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】主要适用于临时性的、短期的监理业务,或者不宜按工程概(预)算的百分比等其他方法计算监理费的监理业务有 。
【简答题】GPS卫星分布在 个轨道面上。
【单选题】Mr. Li is English teacher. We all like . The jacket is .
A.
us, he, him
B.
our, his, him
C.
our, him, his
【单选题】We visited him at his workplace ___ the young trees and ask him about his work.
A.
in
B.
among
C.
between
D.
at
【单选题】We visited our teacher,________ him a merry Christmas
A.
wishing
B.
hoping
C.
congratulating
D.
greeting
【单选题】We visited him ____ when he was in hospital.
A.
every other days
B.
each other day
C.
every other day
D.
every two day
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