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【单选题】
三相笼型异步电动机的制动方法分为()和()两 大类。A.
电气制动、机械制动
B.
反接制动、能耗制动
C.
再生发电制动、机械制动
D.
电气制动、电磁抱闸
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【简答题】Baseball is one of the favorite sports in the USA. Children play baseball in sports fields or in parks. At summer picnics, there is often informal (非正式的) baseball . Boys and girls, young and old t...
【单选题】Suppose Jim and Tom can both produce baseball bats. If Jim’s opportunity cost of producing baseball bats is lower than Tom’s opportunity cost of producing baseball bats, then
A.
Tom must have an absolute advantage in the production of baseball bats.
B.
Jim must have an absolute advantage in the production of baseball bats.
C.
Tom has a comparative advantage in the production of baseball bats.
D.
Jim has a comparative advantage in the production of baseball bats.
【单选题】What is the difference between baseball and golf?
A.
Both are ball games.
B.
Baseball is a team sport, while golf is an individual game.
C.
Baseball is more popular than golf.
D.
Baseball is more difficult than golf.
【判断题】An order bill of lading is a negotiable document. Order bills made out to consignee "or order&qAn order bill of lading is a negotiable document. Order bills made out to consignee "or order" can he tr...
A.
正确
B.
错误
【简答题】阅读理解。 Baseball is one of the favorite sports in the USA. Children play baseball in sports field or in parks. At summer picnics , there is often an informal baseball . Boys and girls, young and old...
【单选题】Tom kept quiet about the accident ________ lose his job.
A.
not in order to
B.
in order not to
C.
in order to not
D.
in not order to
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