问题
单项选择题
PLC在执行程序时所用到的状态值来源于( )。
A．实际输入口
B．输入映像寄存器和输出映像寄存器
C．输出锁存器
D．定时监视器
答案
参考答案：B
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PLC在执行程序时所用到的状态值来源于( )。
A．实际输入口
B．输入映像寄存器和输出映像寄存器
C．输出锁存器
D．定时监视器
参考答案：B
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| I am a mother of three (ages 14, 12 and 3) and have recently completed my college degree. The last 1 I had to take was Sociology and the last project of the term was called "Smile". The class was asked to go out and smile at three people and note down their 2 . Soon after we were 3 the project, my husband, youngest son and I went out to McDonald's. We were standing in line, waiting to be 4 . When all of a sudden everyone around us began to back away. As I turned around, I smelled a 5 "dirty body" smell and there 6 me stood two poor homeless men. As I looked down at the short gentleman close to me, he was " 7 " - his beautiful sky blue eyes were full of the light as he searched for 8 . He said "Good day" as he 9 the few coins he had been holding. The young lady at the counter asked him what they wanted. He said, "Coffee is 10 , Miss," because that was what they could afford. To sit in the restaurant and 11 up, they had to buy something. Then I really felt it - the 12 was so great that I almost reached out and embraced the little man with the blue eyes. That was when I noticed all eyes in the restaurant were 13 me, judging my every action. I smiled and asked for two more breakfast meals on a 14 tray. I then walked to the table that the men had chosen as a 15 spot, put the tray on the table and laid my hand on the blue eyed gentleman's cold hand. He looked 16 at me, with tears in his eyes, and said, "Thank you." I patted his hand and said, "I did not do this for you. God is here working 17 me to give you hope." I returned to college with this story in hand. I 18 "my project" and later the instructor read it to the class. In this way I had 19 my classmates and the people around me. And I graduated with one of the most meaningful lessons in my life - 20 acceptance. | ||||
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