【单选题】下列哪些叙述正确地反映了磁力线的性质 ( ) (1) 磁力线是闭合曲线 (2) 磁力线上任一点的切线为运动电荷的受力方向 (3) 磁力线与载流迥路象环一样互相套连 (4) 磁力线与电流的方向互相服从右手定则
【简答题】什么是市场营销者?市场营销者就是卖主吗?
【单选题】"What is the purpose or intention of the passage?" tests the _________ reading ablity of the test takers.
C.
holistic reading ability
D.
detailed reading ability
【单选题】互联网降低了整个社会的交易成本,提升了全社会的运营效率。( )
【单选题】下列哪些叙述正确地反映了磁力线的性质 ( ) (1) 磁力线是闭合曲线 (2) 磁力线上任一点的切线为运动电荷的受力方向 (3) 磁力线与载流 回 路 像 环一样互相套连 (4) 磁力线与电流的方向互相服从右手定则
【单选题】The internal and external forces that affect a marketer's ability to create, communicate, deliver and exchange offerings of value occur in _________.
A.
the marketing environment
D.
the sociocultural environment