__ please find a copy of our latest catalogue and price list for your reference.
A.Enclose
B.Enclosed
C.Enclosing
D.Encloses
- · 有4位网友选择 B,占比50%
- · 有3位网友选择 D,占比37.5%
- · 有1位网友选择 A,占比12.5%
A.Enclose
B.Enclosed
C.Enclosing
D.Encloses
For a pair of standard involute helical gears,,,,,,. Find: (1) reference circle, addendum circlededemdum circleand center distance. (2) normal pitchand transverse pitch. (3) transverse meshing angleand contact ratio.
A.give it up because it does no good to waste time by repeating Prior Art.
B.re-uate it to find some new aspects to make further contributions.
C.avail yourself of the ready-made materials and research findings and use them in your own paper.
D.either A or B.
A、They were collected from the four major US airlines.
B、They were collected from the 13 largest US airlines.
C、They were collected from all the airlines in the US.
D、They were collected from regional airlines.
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