How many ways the author suggests on how to make more friends? ()
A.Three
B.Four
C.Two
A.Three
B.Four
C.Two
1. The problem is that this kind of freedom cannot easily be given in the modern factory with its complicated machinery which must be used in a fixed way. 2. Since 1991, productivity has increased by 2% a year, which is more than twice the 1978-1987 average. 3. The trouble is that part of the recent acceleration is due to the usual rebound that occurs at this point in a business circle, so is not conclusive evidence of an economic revival in the underlying trend. 4. There is a disjunction between the mass of business anecdote that points to a leap in productivity and the picture reflected by the statistics.
B.SFRchart点检照度时,应测试chart中间位置的白色部分
C.治具的水平度会影响线性测试
D.作业时只要画面全屏,产品可以不在增距镜中心
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