选择公共关系活动方式时,应考虑的几种因素是()。
A.活动影响的范围
B.活动的针对性
C.活动的威力
D.活动效力的持续性
E.活动的可行性
参考答案:A, B, C, D, E
分别将下列各组物质混合并溶于水,最后得到无色透明溶液的是______
A、Na2CO3、HCl、NH4NO3 B、NaCl、AgNO3、CuSO4
C、K2SO4、BaCl2、HNO3 D、NaOH、Na2SO4、FeCl3.
If you see someone fall overboard from a vessel,you should().
A.immediately jump in the water to help the individual
B.call for help and keep the individual in sight
C.run to the radio room to send an emergency message
D.go to the control room for the distress flares