问题
单项选择题
计算机硬件系统中运算器的主要功能是______。
A．函数运算
B．算术运算
C．逻辑运算
D．算术和逻辑运算
答案
参考答案：D
解析： CPU是计算机硬件系统的核心，有计算机的“心脏”之称，它由运算器和控制器组成。运算器用来进行算术运算和逻辑运算，控制器用来向各部件发出控制信号，保证整机协调一致工作，是整个计算机的指挥中心。
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计算机硬件系统中运算器的主要功能是______。
A．函数运算
B．算术运算
C．逻辑运算
D．算术和逻辑运算
参考答案：D
解析： CPU是计算机硬件系统的核心，有计算机的“心脏”之称，它由运算器和控制器组成。运算器用来进行算术运算和逻辑运算，控制器用来向各部件发出控制信号，保证整机协调一致工作，是整个计算机的指挥中心。
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| Some years ago I was offered a writing assignment that would require three months of travel through Europe. I had been 1 a couple of times, but I could hardly 2 to know my ways around the continent. 3 , my knowledge of foreign languages was 4 to a little college French. I 5 . How would I, unable to speak the language, 6 familiar with local geography or transportation systems, conduct interviews and do 7 ? It seemed impossible, and with considerable 8 I sat down to write a letter rejecting the 9 . Halfway through, a 10 ran through my mind: you can't learn if you don't try. So I 11 the assignment. There were some bad 12 . But by the time I had finished the trip, I was an experienced traveler. And ever since, I have never hesitated to head for even the most 13 places, without guides or 14 advanced bookings, confident that somehow I will 15 . The point is that the new, the different, is almost by definition 16 . But each time you try something, you learn, and as the learning 17 , the World opens to you. I've learned to ski at 40, and flown up the Rhine River in a(n) 18 . And I know I'll go on doing such things. It's not because I'm braver or more daring than others. I'm not. But I'll accept worry as another name for 19 and I believe I can 20 wonders. | ||||
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