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【简答题】
从拓扑结构来看,计算机网络是由 和 构成的几何图形。
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举一反三
【简答题】Franklin Roosevelt told the Americans that the only thing we have to fear is ________.
【单选题】In his inaugural speech,______said that 'the only thing we have to fear is fear itself'.
A.
Lyndon Johnson
B.
Theodore Roosevelt
C.
John F. Kennedy
D.
Franklin Roosevelt
【单选题】'The only thing we have to fear is fear itself' meant that ______.
A.
Americans would lose if they gave way to fear
B.
Americans have no real troubles during the 1930s
C.
F. D. R. would solve America's problems because he was not afraid
D.
Americans were in trouble because they hadn't looked at their troubles with clear heads
【单选题】In his inaugural speech,______said that 'the only tiling we have to fear is fear itself.'
A.
Abraham Lincoln
B.
Theodore Roosevelt
C.
Woodrow Wilson
D.
Franklin Roosevelt
【简答题】质量为50kg的人站在电梯里的磅秤上，当电梯以4.9m/s^2的加速度上升时，磅秤读数是 kg.
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