从众具有两重性，具体表现为 [ ]
①广泛性 ②真实性 ③虚伪性 ④欺骗性 ⑤积极性 ⑥消极性
A．①②
B．③④
C．⑤⑥
D．④⑤
答案：C
语法填空：（共10小题，每小题1.5分，满分15分）
Chinese proverbs(谚语) are rich and they are still __51__ (wide) used in Chinese people’s daily life. __52__ these proverbs there are often interesting stories. For example, the proverb, “plucking up a crop to help it grow”, __53__ (base) on the following story.
It is said that a short-tempered man in the Song Dynasty (960-1279) was very anxious to help __54__ rice crop grow up quickly. He was thinking about __55__day and night. But the crop was growing much slower than he expected.
One day, he came up with an idea __56__ he would pluck up all of his crop a few inches. He did so the next day.
He was very tired from doing this for a whole day, __57__ he felt very happy since the crop did “grow” __58__ (high).
His son heard about this and went to see the crop. Unfortunately, the leaves of the crop began to wither.
This proverb is saying we have to let things go in their __59__ (nature) course. Being too anxious to help an event develop often __60__ (result) in the contrary to our intention.
关于可编程序控制器的工作原理以下叙述错误的是( )。
A．PLO工作的主要特点是输入信号集中批处理，执行过程集中批处理和输出控制也集中批处理
B．PLC以中断：工：作方式，根据中断请求将信号读入到寄存输入状态的输入映像寄存器中存储，这一过程称为采样
C．PLC的工作过程一般可分为输入采样阶段、程序执行阶段和输出刷新阶段三个主要阶段
D．PLC按顺序对程序进行扫描，即从上到下、从左到右地扫描每条指令，并分别从输入映像寄存器和输出映像寄存器中获得所需的数据进行运算、处理，再将程序执行的结果写入寄存执行结果的输出映像寄存器中保存
