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【单选题】
平底凸轮机构如图所示， AB 可沿导轨上下移动，偏心圆盘绕轴O 转动，轴O 位于轴线上。工作时的平底始终接触凸轮表面。该凸轮半径为R，偏心距OC= e =0.1m，凸轮绕轴O 转动的角速度为ω=2rad/s ，OC 与水平线夹角ϕ 。当ϕ =0° 时，的速度为（ ）。 【图片】A.
0.2
B.
0.1
C.
0.4
D.
0.8
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【多选题】描述函数法分析非线性系统的应用条件是（ ）。
A.
结构图只有一个非线性环节和一个线性环节串联的闭环结构
B.
非线性特性的静态输入输出关系是关于原点对称的
C.
系统的外加输入信号是正弦输入信号
D.
系统的线性部分具有良好的低通滤波特性
【单选题】Mike Tyson had both height and weight in his ______ during the fight, but he was knocked out in the third round.
A.
comment
B.
negotiation
C.
margin
D.
favor
【单选题】Mike Tyson was put in prison last August because he
A.
violated the traffic law.
B.
illegally attacked a boxer.
C.
attacked sB．after a traffic accident.
D.
failed to finish his contract.
【简答题】Group Four: inducement, disciplinary, acknowledgement, subization, whisky, feudalism, heavyweight, rheumatism, suspense, crumb Mike Tyson was ____champion of the world.
【单选题】选择填空。 — Can I have ______ milk? — Sorry, we don't have ______ milk. [ ]
A.
some; any
B.
some; some
C.
any; some
【单选题】--Would you like some coffee? -- Yes, and please get me some milk, too. I prefer coffee_____ milk. [ ]
A.
with
B.
of
C.
to
D.
than
【简答题】Mike Tyson was a very famous boxer because he could often knock out his opponent with only one (13) __________.
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