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【单选题】
光滑的水平桌面上,有一长为2l、质量为m的细杆,可绕过其中点且垂直于杆的竖直光滑固定轴O自由转动,其转动惯量为m【图片】/3,起初杆静止。桌面上有两个质量均为m的小球,各自在垂直与杆的方向上,正对着杆的一端,以相同的速率v相,如图所示。当两小球同时与杆的两个端点发生完全非弹性碰撞后,就与杆粘在一起转动,则这一系统碰撞后的转动角速度为[ ]
A.
2 v/3l
B.
4v/5l
C.
6v7l
D.
8 v/9l
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举一反三
【单选题】In Paragraph 19, Napoleon Bonaparte I is mentioned to show that ____.
A.
Sunzi’s Art of War was spread to France much early before the Napoleonic Wars
B.
Sunzi’s Art of War was translated into foreign languages
C.
Napoleon missed the opportunity to read Sunzi’s Art of War
D.
Sunzi’s ideas about war were accepted by Napoleon
【简答题】太和殿上垂脊兽由上而下、从左至右,骑鹤仙人之后依次为
【简答题】任何具有两个出线端的部分电路都称为 __ __ ,其中若包含电源则称为 ___ _ 。
【简答题】假设 n 为 2 的乘幂,并且 n>2 ,试求下列算法的时间复杂度及变量 count 的值(以 n 的函数形式表示)。 int Time (int n) { count = 0; x=2; while(x
【简答题】任何具有两个出线端的部分电路都称为 _________,其中若包含电源称为__________。
【单选题】Nicholas Chauvin, a French soldier, aired his veneration of Napoleon Bonaparte so ______ and unceasingly that he became the laughingstock of all people in Europe.
A.
vociferously
B.
patriotically
C.
verbosely
D.
loquaciously
【单选题】拜访是对他人私人空间或( )的造访,不可占用主人太多的时间。
A.
生活空间
B.
个人空间
C.
休闲空间
D.
工作空间
【单选题】听力原文: Napoleon Bonaparte was murdered by arsenic poisoning and did not die naturally of a stomach cancer, according to a new toxicological study which attempts to end long running historical controver...
A.
died of arsenic poisoning
B.
died of a stomach cancer
C.
was killed by British army
D.
was murdered by Prussian forces
【简答题】任何具有两个出线端的部分电路都称为____,其中若包含电源则称 ____ 。
【简答题】任何具有两个出线端的部分电路都称为(),其中包含电源则称为()
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