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【简答题】
弯曲时,用 表示板料弯曲变形程度,不致使材料破坏的弯曲极限半径称最小弯曲半径。
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【简答题】影响纯扭构件受扭承载力的主要因素有哪些?
【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.
【简答题】What can we know about the flight situation of aircraft according to the indication 3 and 4 in following Figure?
【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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