问题
单项选择题
不属于PLC控制器主要检测的三种故障类型是()
A、硬件故障
B、软件故障
C、主要故障
D、次要故障
答案
参考答案:B
不属于PLC控制器主要检测的三种故障类型是()
A、硬件故障
B、软件故障
C、主要故障
D、次要故障
参考答案:B
短文填空。
After wimung the lottery tickets There was once a large, fat woman. She had a small, __1__ husband. Her husband worked in a big __2__ , and got some weekly (每周的) pay every Friday evening. As soon as he got home on Fridays, he had to give his wife all his __3__ and his wife gave him back __4__ enough to buy him lunch in the office everv day. One day the small man came home very __5__ . He hurried into the living room. His wife was __6__ to the radio and eating apples there Youll never guess what __7__ to me today, dear," he said. He waited for a few seconds and then said again, "I won ten __8__ dollars by buying the lottery tickets!" "That's wondedull" shouted his wife happily. But then she thought for a few __9__ and said __10__ . "But wait a minute! How could you have enough money to buy the tickets?" |