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更多“机械安全（mechanical security)”相关的问题
A. meaningful drilling and communicative drilling
B. mechanical drilling and meaningful drilling
C. mechanical practice and meaningful practice
D. meaningful practice and communicative practice
Generally, machine utilization rate should be ______ machine mechanical availability.
A. less than or equal to B. greater than or equal to C. always equal to
The early computer was not reliable mainly because of ______.
A．the poor software B．DOS, the disc operating system
C．the mechanical parts D．the hardware
What is the purpose of devising Turing Machine？
A．To calculate.
B．To make an experiment.
C．To show that the machine is part of a test.
D．To specify what should be understood by a mechanical process.
Which of the following is true？
A．The 18th century was the age of steam engine.
B．The 19th century was the time of the great mechanical system.
C．The 20th century was marked by installation of telephone networks and the invention of television.
D．None of the above.
Henry Ford changed the American society ______.
A．through great social revolution
B．through automotive technological revolution
C．through numerous mechanical inventions
D．through radical political reforms
A．provides some mechanical interlocking with the solid
B．exhibits a large contact angle with the solid
C．enters into some form. ofchemieal reaction with the solid
D．exhibits a small contact angle with the solid
Wich of the following is FALSE concerning fluoride release and uptake with glass ionomers()
A．High level of fluoride is released initially
B．Sustained low levels of fluoride release over time
C．Fluoride release results in reduction of mechanical properties of the set cement
D．Recharge may be provided by topical fluorides
