未知题型 The sentence 'good looks cut both ways for women' (Line 1, Paragraph 5) means thatA.attractive women have tremendous potential impact on public jobs.B.good-looking women always get the best of everything.C.being attractive is not always an advantage for women.D.attractive women do not do as well as unattractive women in managerial positions.
单项选择题 A、 A=[2,-1,-3;-2,1,5;1,-3,-1];B=[1;9;-4];A\B B、 A=(2,-1,-3;-2,1,5;1,-3,-1);B=[1;9;-4];A\B C、 A=[2,-1,-3;-2,1,5;1,-3,-1];B=[1,9,-4];A\B D、A=[2,-1,-3;-2,1,5;1,-3,-1];B=[1;9;-4];A/B
单项选择题 一台同步速为900r/min的三相异步电动机运行时转差率s=0.028,此时转子转速为( )r/min。