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【单选题】
Many people like the color white as it is a ______ of purity.
A.
symbol
B.
sign
C.
signal
D.
symptom
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【单选题】质量为m的小球系于细绳的一端,绳的另一端敷在一根竖直放置的细棒上,如图所示。小球被约束在水平面内绕细棒旋转,某时刻角速度为ω 1 ,细绳的长度为r 1 。当旋转若干圈后,由于细绳缠绕在细棒上,绳长变为r 2 ,则这时小球绕细棒旋转的角速度ω 2 与原来ω 1 的关系为( )
A.
;
B.
;
C.
;
D.
【判断题】51单片机的两个定时/计数器T0和T1均有定时和计数两种工作模式。
A.
正确
B.
错误
【简答题】Li:Hello! (1)_________________ , Professor Waters. Waters: Good afternoon. Mr. Li. Long time no see. Li: Yeah , it’s been quite a long time .How are you? Waters: (2)_________,thanks. (3)_____________?...
【单选题】The reservation is Mr. Li.
A.
under
B.
on
C.
with
D.
by
【简答题】请简述单反相机的取景特点和原理。
【简答题】Li:Hello! (1)_________________ , Professor Waters. Waters: Good afternoon. Mr. Li. Long time no see. Li: Yeah , it’s been quite a long time .How are you? Waters: (2)_________,thanks. (3)_____________?...
【单选题】正视眼的屈光力为
A.
小于58.64D
B.
大于58.64D
C.
等于58.64D
D.
大于43.05D
【单选题】The reservation is ______ Mr. Li.
A.
under
B.
by
C.
of
D.
at
【单选题】The trees ___front of the house are ___the charge of Mr. Li.
A.
in; in
B.
at; in
C.
in; by
D.
from; in
【单选题】“ Look, Officer. I ’ m not drunk. I ’ m as as a judge. ” The drunkard pleaded for himself.
A.
calm
B.
steady
C.
sober
D.
somber
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