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【单选题】
绕线转子异步电动机与笼型异步电动机的主要区别是绕线转子异步电动机的转子采用( )。A.
三相笼型绕组
B.
三相转子绕组
C.
三相对称绕组
D.
三相非对称绕组
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举一反三
【简答题】肺上界即肺尖的上界，正常人肺尖区叩诊有一 带，其平均宽度为 。肺气肿时，肺上界 ;肺尖结核时，肺上界 。
【简答题】As the United States nears the tenth anniversary of the 9/11 attacks that killed more than 3,000 people, President Obama announced Sunday night that the al Qaeda（） leader and mind of that ho...
【简答题】正常成年人肺尖的宽度为 、正常成年人肺下界的移动范围为 。
【单选题】Argument Write the letter of the statement that is the point of the following argument. The other statements are support for that point. ______
A.
Several of the Flight 93 passengers were athletes or had been trained in combat.
B.
Todd Beamer told Lisa Jefferson that the passengers would try to "jump" the hijackers.
C.
Beginning at 9:57, the cockpit voice recorder picked up the sounds of a struggle between the passengers and the hijackers.
D.
Osama bin Laden was wrong to think Americans were soft and weak.
【简答题】正常肺尖的宽度为（）。
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