题目内容
（请给出正确答案）
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
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A.use the washing machine
B.to use the washing machine
C.using the washing machine
According to the way the machine operated, the felling machine can be classified into ______.
A. three-wheel machine vs. four-wheel machine
B. drive to tree machine vs. swing to tree machine
C. saw-head machine vs. shear-head machine
A.similar
B.same
C.like
D.familiar
A.as
B.which
C.that
D.the one
Which is not one of the four machine models？
A．SIMD B．MIMD
C．MISD D．SIDM
A. Grapple skidder B. Clam-bunk skidder C. Cable skidder
