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【简答题】
直流电动机的结构主要由____和____两个基本部分组成,其电刷装置是安装在定子,而换向器是安装在电钮(转子) 上。
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参考答案:
举一反三
【单选题】Mrs. Black doesn't believe her son is able to design a digital camera, ______? [     ]
A.
is he
B.
isn't he
C.
doesn't she
D.
does she
【单选题】对跨度不小于 m 的现浇钢筋混凝土梁、板,其模板应按设计要求起拱。
A.
3
B.
4
C.
5
D.
6
【判断题】计划评审(PERT)预测法进行预测的依据是一个经验公式
A.
正确
B.
错误
【单选题】Mrs. Black doesn’t believe that her son is able to design a digital camera, ______?
A.
is he
B.
isn’t he
C.
doesn’t she
D.
does she
【单选题】He hasn't the funds to carry out his design.
A.
make
B.
keep
C.
change
D.
implement
【单选题】I don't believe Jim is able to design a digital camera, ______? [     ]
A.
is he
B.
isn't he
C.
doesn't he
D.
does he
【单选题】Which one is not the driving factors of enterprises international operation?
A.
Legal factors
B.
Market factors
C.
Competitive factors
D.
Profit factors
【单选题】Black doesn’t believe his son is able to design a digital camera,_____?
A.
is he
B.
isn’t he
C.
doesn’t he
D.
does he
【单选题】对跨度不小于______m的现浇混凝土梁、板,其模板应按设计要求起拱。
A.
1
B.
2
C.
3
D.
4
【单选题】Which statement is NOT right about congenital factors?
A.
Refers to harmful factors affecting fetal growth and development
B.
Teratogenic drugs used by mothers in early pregnancy lead to malformation
C.
Some genetic factors are also congenital factors
D.
Hemophilia A is related to congenital factor
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