White-collar crime—for example, accepting a bribe from a customer or stealing from an employer—is more costly than “common” crime.White-collar crime means crime committed by___________
A. gang members.
B. strangers.
C. people in the workplace.
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半导体是一种导电能力介于______和______之间的物质,半导体材料有_____和_____。
若已知某二极管是正常的,用数字式万用表测二极管极性时,小阻值那次黑表笔接____极,红表笔接____极。但若为指针式万用表,则结论为:小阻值那次黑表笔接____极。
用万用表欧姆档测量小功率二极管的极性和好坏时,应把转换开关拨到()。
A. ~50V
B. R×100Ω或R×10Ω
C. —10V
D. R×1KΩ