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更多“明文p=the machine is not breakab…”相关的问题
A jewellery company makes rings (R) and necklaces (N).
The resources available to the company have been analysed and two constraints have been identified:
Labour time 3R + 2N ≤ 2,400 hours
Machine time 0·5R + 0·4N ≤ 410 hours
The management accountant has used linear programming to determine that R = 500 and N = 400.
Which of the following is/are slack resources？
(1) Labour time available
(2) Machine time available
A.1 only
B.2 only
C.Both 1 and 2
D.Neither 1 nor 2
The machine made a terrible ________ so we couldn’t________ each other.
A.noise…hear
B.voice…hear
C.sound…listen
D.shout…listen
_____ plastics, the machine is light in weight.
A.To make of
B.Having made
C.To be made of
D.Made of
A．take place
B．put into use
C．come into use
D．take action
The machine will continue to make much noise we have it repaired.
A．when
B．because
C．if
D．unless,
In this passage, the word "press"(Para. 2) means______.
A．a machine for printing
B．the business of printing
C．great force
D．newspapers
__________A. machine B. dictionary C. Russian D. question
A.人的因素(man)
B.机器或设备(machine)
C.原材料(material)
D.环境条件(environment)
E.测试手段(measurement)
