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【判断题】
刚性转子静平衡的条件是总惯性力为零;而动平衡的条件是总惯性力为零,同时总惯性力矩也为零。A.
正确
B.
错误
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举一反三
【简答题】听下面一段对话，完成第1至4题。 1. What can we know about St. Albans? A. It's where Cambridge is. B. It's at the seaside. C. It's not in France. 2. Why did Herbert come home at that time? A. Because his holiday was ...
【多选题】Ac cording to the following figure, what can we know about the flight situation of aircraft according to the indications?
A.
For indication 3, the aircraft is doing left turn, and the aircraft slip now.
B.
For indication 4, the aircraft is doing left turn, and the aircraft skid now.
C.
For indication 3, the aircraft is doing left turn, and the aircraft skid now.
D.
For indication 4, the aircraft is doing left turn, and the aircraft slip now.
【单选题】What can we know from the sentence 'And Wall Street banks, whose lucrative stranglehold on IPOs is threatened, are also keen to prove that companies cannot list without the help of banks in finding bu...
A.
IPOs are controlled by Wall Street banks, SEC, and big investors.
B.
Compared with investors, Wall Street banks are not big stakeholders in IPOs.
C.
Wall Street banks usually make a lot of profit out of their service in companies' IPOs.
D.
Wall Street banks refuse to find buyers for those companies who threaten their own business development.
【简答题】What can we know about the flight situation of aircraft according to the indication 3 and 4 in following Figure?
【单选题】4) What can we know abou reading programs offered by libraries in the Us from the passage?
A.
Boos appropriate for youngsters are arranged to read for them.
B.
Youngsters and their parents are required to read books to each other.
C.
Youngsters are organized to read one of their favorite books in groups.
D.
Youngsters sit together with their parents to discuss about some books.
【简答题】听下面一段材料，回答第1至4题。 1. What can we know about St.Albans? A. It's where Cambridge is. B. It's at the seaside. C. It's not in France. 2. Why did Herbert come home at that time? A. Because his holiday was o...
【单选题】低压电器是指工作在交流电源( )以下、直流电压( )以下的电器。
A.
1500V、1500V
B.
1200V、1200V
C.
1500V、1200V
D.
1200V、1500V
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