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【单选题】
CPU响应中断请求和响应DMA请求的本质区别是（）。A.
中断响应靠软件实现
B.
响应中断时CPU仍然能控制总线，而响应DMA请求时，CPU要让出总线
C.
速度慢
D.
控制简单
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举一反三
【单选题】______ the distance was too long and the time was short, we decided to fly there instead.
A.
Discovering
B.
To discover
C.
To have discovered
D.
Discovered
【单选题】产生测量误差的因素主要有________。
A.
计量器具的误差 2、测量方法误差
B.
安装定位误差 4、环境条件所引起的误差
C.
1,2,3
D.
2,3,4
E.
1,3,4
F.
1,2,3,4
【简答题】产生测量误差的因素主要有三方面,即观测者,测量仪器和观测过程中的 。
【单选题】____ the distance was too far and the time was short, we decided to fly there instead of going there by train.
A.
Discovering
B.
To discover
C.
To have discovered
D.
Discovered
【单选题】______ the distance was too long and the time was short, we decided not to drive to Florida.
A.
Discovering
B.
To discover
C.
To have discovered
D.
Discovered
【简答题】A．Somewhere that is within a short distance of campus. B．An apartment without furnitures. C．A place where she can live alone. D．An apartment whose rent is very low.
【简答题】A．Somewhere that is within a short driving distance of campus. B．An apartment with furniture already in it. C．A place where she can live alone. D．A big house with a parking space.
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