A.3.6×106J
B.6×105J
C.104J
D.3.6×105J
答案:B
The two friends _____ on the Internet for three hours, and they would go on till the next morning.
A.had been chatting
B.had chatted
C.were chatting
D.has been chatting
根据产业生命周期理论,创业期的企业特征是()。
A.产品品种单一、产量低、市场占有率低、成本高
B.产品拥有市场,企业规模迅速扩大,管理开始规范
C.企业规模、销售量、利润、市场占有率、研发能力等达到最佳状态
D.产品更新慢,市场占有率下降,管理困难