客户购买任何产品,首先需要认可产品的:()
A.价格
B.价值
C.质量
D.外观
参考答案:B
Recently, there is ____ boom(繁荣)in population mobility and according to ____ national population survey of 2004, 17 percent of the population move every year.
A.the; a
B.a; the
C./; a
D.the;/
简易呼吸器每次的送气量及呼吸速率为
A.500~1000ml/次,22~24次/分B.1000~15OOml/次,22~24次/分C.200~400ml/次,22~24次/分D.500~1000ml/次,16~20次/分E.200~400ml/次,16~20次/分