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【单选题】
(课文理解U5textA P15-16) Which sentence can describe the situation of workers without special or valuable skills according to paragraphs 15-16?
A.
It is not difficult for trade unions to organize workers online.
B.
Workers can not afford to pay for their pension pots and their health-care coverage has also decreased.
C.
Workers on a contract basis working through online platforms also have the right to gain a minimum wage.
D.
Because of automation, the demand for low-skill labors is increasing.
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【单选题】继电器—接触器控制系统的优点是 。
A.
接线调试简便
B.
控制功能简单时成本较低
C.
柔性好
D.
功能强大
【简答题】Task 2 Read the passage and match each paragraph with the corresponding aspect of the company.
【单选题】与继电器控制相比,下面哪一项不是PLC控制的优点( )
A.
软逻辑,体积小,接线少,控制灵活
B.
由半导体电路实现控制、指令执行时间短,一般为微秒级
C.
系统设计完成后,施工与程序设计同时进行,周期长
D.
无硬触点,寿命长,可靠性高,有自诊断功能
【单选题】The Mayan Indians lived in Mexico for thousands of years before the Spanish arrived in the 1500s. The Maya were an intelt, culturally rich people whose achievements were many. The Mayan people kn...
A.
a magazine
B.
a literature book
C.
an art book
D.
a historical book
【单选题】The war went on for years, ______thousands of people.
A.
kill
B.
killed
C.
killing
D.
to kill
【简答题】继电-接触器控制系统的优缺点分别是什么?
【简答题】• 普罗泰戈拉 提出了“ ”的著名命题,认为事物的存在是相对于人的感觉而言的,人的感觉怎样,事物就是怎样。 这一命题不是说人决定着万物的存在或不存在,而是说人的认识决定存在着的事物为什么是这样而不是那样。
【单选题】The lack of ( ) from thousands of years of settlement and clear-cutting prompted the development of stir-frying.
A.
harvest
B.
cooking ingredients
C.
cookers
D.
cooking fuel
【多选题】PLC与继电接触器控制系统的比较 ,哪些是PLC的优点?
A.
灵活性和扩展性 极佳
B.
可靠性高和可维护性好
C.
控制速度快和稳定性高 ·
D.
延时的可调性好与精度高
E.
设计与施工周期短,调试修改方便、性能价格比高
【简答题】The first (know)area was in India, where diamonds were found thousands of years ago.
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