CATS不是一个实时控制系统。
第1题：
Judging from this passage, people of the Middle Ages probably ______.
A. treated black cats with respect
B. treated black cats badly
C. were witches if they had black cats
D. thought black cats were beautiful
第2题：
直接数字控制系统一般为在线实时系统。()
第3题：
A.实时数据采集
B.实时控制决策
C.实时控制输出
D.逻辑推理
第4题：
PLC控制系统属于实时性控制系统。
第5题：
实时系统可分成两类，即实时控制系统和______。
第6题：
计算机控制系统中控制过程可归纳为三个过程，下列不属于该过程的是()。
A、实时数据采集
B、实时控制决策
C、实时控制输出
D、实时输入
第7题：
从本质上看，计算机控制系统的工作原理可归纳为()等三个步骤。
A、实时的控制输出
B、实时的控制运算
C、实时的数据采集
D、实时的控制决策
第8题：
Passage Five
Many superstitious people are afraid of black cats. They believe that black cats have a strange power. If a black cat crosses their path, they think they will have bad luck.
Black cats haven't always had such a bad reputation. Long ago, the Egyptians thought that black cats were holy animals. They even worshipped them. Pasht was an Egyptian goddess who had a woman's body and a cat's head. Because the Egyptians had so much respect for black cats, they often buried the sacred creatures with great ceremony. Mummies of cats have often been found in ancient cemetery ruins. To keep the cats company after they died, mice were sometimes buried beside them.
Feelings about black cats have always been strong. People have thought they were either very good or very bad. The people of Europe, in the Middle Ages, believed black cats were the evil friends of witches and the Devil. Witches were said to have the power to change themselves into black cats. People believed that you could not tell whether a black cat was just a cat, or whether it was a witch disguising herself as she plotted some evil scheme. The brain of a black cat was thought to be a main ingredient in witch's brew.
Unlike their ancestors of the Middle Ages, Englishmen today consider black cats to be good luck charms. Fishermen's wives often keep a black cat around so that their husbands will be protected when they are out at sea.
52. The Egyptian goddess Pasht had a ______.
A. woman's head and a cat's body
B. woman's head and a lion's body
C. cat's head and a man's body
D. woman's body and a cat's head
第9题：
计算机继电保护系统是由()的支持和()所构成的一个实时控制系统。
第10题：
计算机控制系统中实时控制的含义。