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【判断题】
行程开关又称限位开关, 用于机械设备运动部件的位置检测, 是利用生产机械某些运动部件的碰撞来发出控制指令, 以控制其运动方向或行程的主令电器。A.
正确
B.
错误
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举一反三
【单选题】What is the dual system of Germany vocational educational?
A.
It combines apprenticeship in a company and vocational training in a school.
B.
It generally takes place in a secondary public school.
C.
It takes place over the same period of time on different days of the week or in blocks of several weeks.
D.
It does not charge tuition fees.
【单选题】根据代码,下列正确的是:
A.
本例演示：如何使用三份不同的文档制作一个水平框架。
B.
本例演示：如何使用三份不同的文档制作一个垂直框架。
C.
frame_c 这个框架，如果frame_c.html宽度过大，会显示滚动条。
D.
frame_b.htm的边框为0了
【单选题】下面是正确的Frame类的构造方法的是()
A.
Frame()
B.
Frame(String)
C.
Frame(String,int,int)
D.
Frame(String,int,int,Color)
【简答题】A．Vocational education is more associated with trades and crafts. B．Young people are trained by employers on the job. C．Vocational education is carried out in education institutions. D．The government ...
【简答题】A．〈frame nosize〉 B．〈frame noresize〉 C． D．
【单选题】Which of the following can best conclude the main idea of the passage?
A.
Vocational education is equal to college and university education.
B.
Graduates from vocational education have vast range of employment opportunities.
C.
Vocational education has to be reformed to be adapted to current demands.
D.
Vocational education has its advantages and disadvantages.
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