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MCS-51单片机外扩存储器芯片时,4个I/O口中用作数据总线的是( )口
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举一反三
【单选题】Advocates of flexible exchange rates claim that under flexible exchange rates,
A.
no country would be forced to import only inflation from abroad.
B.
no country would be forced to import only deflation from abroad.
C.
no country would be forced to import inflation and deflation from abroad.
D.
flexible exchange rates are not able to halt importing inflation from abroad.
E.
flexible exchange rates are not able to halt importing deflation from abroad.
【单选题】下列哪个选项不是发动机工作时,发动机电控单元ECU的功用。不断地接收各传感器输送来的信号,并按内存的程序对接收到的信号进行运算、存储和分析处理,最后向点火器发出控制指令,以完成对点火提前角、通电时间及爆震的控制。
A.
不断地接收各传感器输送来的信号。
B.
不断地接收各传感器输送来的信号，并按内存的程序对接收到的信号进行运算、存储和分析处理。
C.
向点火器发出控制指令。
D.
产生曲轴位置、凸轮轴位置信号。
【单选题】A dvocates of flexible exchange rates claim that under flexible exchange rates
A.
flexible exchange rates are not able to halt importing deflation from abroad.
B.
no country would be forced to import inflation and deflation from abroad
C.
flexible exchange rates are not able to halt importing inflation from abroad
D.
no country would be forced to import only inflation from abroad
【简答题】鸟类骨骼为适应飞翔生活与许多特化,表现在骨骼____,骨骼内有____的腔隙,头骨、脊柱、骨盘、肢骨的骨块有____现象,____骨和____骨有较大的变形。
【单选题】在Word 2010中,将整篇文档的内容全部选中,可以使用的快捷键是( )
A.
Ctrl+X ----- 剪切
B.
Ctrl+C ----- 复制
C.
Ctrl+V ----- 粘贴
D.
Ctrl+A ----- 全选
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