集中性目标营销策略的主要缺点是经营成本高、风险过于集中。( )
参考答案：UNKNOWN
甲地至乙地的路程为253千米，一辆客车从甲地出发，1.2小时后刚好行了108千米，照这样的速度，到达乙地还需要多少小时？（得数保留一位小数）
The recent conference on the effective use of the seas and oceans was another attempt resolving major differences among countries with conflicting interests.
A．resolve
B．resolves
C．to resolve
D．being resolved
