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【单选题】
SDH再生段跟踪字节为()A.
A1
B.
J0
C.
F1
D.
B1
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【单选题】听力原文： Many families in the United States have a larger income than ever before, but people are finding it difficult to make ends meet anyway. Almost everyone is wondering, 'What happens to all my mone...
A.
A larger income often results in a lower living standard.
B.
No more money is left over in spite of a larger income.
C.
To put away some money has become a necessity.
D.
They don't know where their money has gone.
【简答题】输入一个n(1
【单选题】以下是有关DMA方式的叙述：①DMA控制器向CPU请求的是总线使用权。②DMA方式可用于键盘和鼠标器的数据输入。③DMA方式下整个I/O过程完全不需要CPU介入。④DMA方式需要用中断处理进行辅助操作。以上叙述中，错误的是（ ）。
A.
①②
B.
②③
C.
②④
D.
③④
【单选题】The difference between what happed in the 1970s and what is happening now is that ______.
A.
much more oil was produced back in the 1970s than today
B.
microscopic control is much better nowadays than in 1970s
C.
current oil market have cushions thanks to governments' stockpiles
D.
the oil situation enjoyed a more stability 40 years ago
【单选题】以下是有关对DMA方式的叙述：① DMA控制器向CPU请求的是总线使用权② DMA方式可用于键盘和鼠标器的数据输入③ DMA方式下整个I/O过程完全不需要CPU介入④ DMA方式需要用中断处理进行辅助操作 以上叙述中，错误的是（ ）。
A.
仅 ① 和 ②
B.
仅 ② 和 ③
C.
仅 ② 和 ④
D.
仅 ③ 和 ④
【简答题】名义利率(nominal interest rate)和实际利率(real interest rate)
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【简答题】输入一个n(1