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【判断题】
计算机系统是由硬件系统和软件系统两部分组成。
A.
正确
B.
错误
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参考答案:
举一反三
【单选题】电磁波测距的基本原理是( )(说明:c为光速,t为时间差,D为空 间距离)。
A.
D=ct
B.
D=1/2ct
C.
D=1/4ct
D.
D=2ct
【单选题】All the following can damage hearing EXCEPT______.
A.
excessive noise
B.
too much moderate noise for a long time
C.
intense noise for even a short time
D.
moderate noise for a short time
【单选题】电磁波测距的基本原理是:( )(说明:c为光速,t为时间差,D为空间距离)。
A.
D=c·t
B.
D=½c·t
C.
D=¼c·t
D.
D=2c·t
【单选题】There is ______ traffic and ______ peo ple in the street at the moment. [     ]
A.
too much; too many
B.
too many; too much
C.
much too; too many
【单选题】电磁波测距的基本原理是:()。(说明: c为光速,为时间差,D为空间距离)
A.
D=ct
B.
D=ct*1/2
C.
D=1/4*ct
D.
D=2dt
【单选题】So many people violate traffic regulations that we ____ put too much emphasis on the importance of traffic safety.
A.
must not
B.
should not
C.
need not
D.
cannot
【单选题】------Don’t drive so fast please. There is _________traffic at this time of the day.
A.
much too
B.
too much
C.
many too
D.
too many
【单选题】电磁波测距的基本原理是:( )(说明:c为光速,t为时间差,D为空间距离)。
A.
B.
C.
D.
D = c.t/2
【单选题】I don't like those big cities which have got ____ people and ____ traffic. [     ]
A.
too much; too many
B.
many too; too much
C.
too many; too much
D.
too many; much too
【单选题】电磁波测距的基本原理是:( )(说明:c为光速,t为时间差,D为空间距离)。
A.
D=c*t
B.
D=c*t/2
C.
D=c*t/4
D.
D=2c*t
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