【单选题】来访者通过咨询发生了改变,下列对这种改变表述正确的是()
【简答题】计算: (1) (2) (3)(﹣2) 3 +3×(﹣1) 2 ﹣(﹣1) 4 (4) (5) (6) (7)﹣3.5÷ ×(﹣ )×|﹣ | (8) .
【简答题】两个相同的电偶极子组成一个电四极子,如图14-2所示。 两个电偶极子在同一直线上且负电荷重合,它们的电偶极距p=ql,但方向相反。试证其延长线上距中心为r处的电场强度大小为 式中的Q=2ql2称为电四极子的电四极矩。
【单选题】'The world catches you up' ( Para 3 ) means that you are trying to achieve the impossible things by trying to be free.
【单选题】It's good ______ you to keep ______ when you have something difficult ______. [ ]
D.
of; trying; to be done
【单选题】If you are desperately trying to get a job, you are ____.
A.
trying very hard to get it
B.
caring little whether you get it or not