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【判断题】
当电动机切断交流电源后,立即在定子绕组的任意两相中输入相反的交流电,迫使电动机迅速停转的方法叫能耗制动(动能制动)。( )A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【单选题】?Read the article below about the job of store assistants. ?choose the best word to fill each gap from A, B, C or D. ?For each question (19-33), mark one letter (A, B, C or D) The move to self-service...
A.
stored
B.
provided
C.
stocked
D.
packed
【单选题】桥拱( ),即敞肩拱。
A.
拱肩两端各建两个小拱,桥栏不设栏板
B.
肩敞开,桥栏不设栏板
C.
肩敞开,拱肩两端各建两个小拱
D.
拱肩两端各建两个小拱,桥身下分11孔
【单选题】•Read the article about packaging and labeling. •Choose the best word to fill each gap from A, B, C or D that follow. •For each Question 21-30, mark one letter (A, B, C or D) on your Answer Sheet. Pac...
A.
goods
B.
cargoes
C.
merchandise
D.
products
【单选题】?Read the article below about the World Trade Organization. ?Choose the best word to fill each gap from A, B, C, or D. ?For each Question 21-30, mark one letter (A, B, C or D) on your Answer Sheet. Th...
A.
formation
B.
framework
C.
forward
D.
fronted
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