商业模式的构成要素不包括哪一项()。
A.目标毛利
B.价值主张
C.市场细分
D.发现计划
参考答案:D
When and where to go for the onsalary holiday still________.[ ]
A. are remained to decide
B. is remaining to decide
C. remain to be decided
D. remains to be decided
在倾角大的巷道作业时,要采取必要措施()
A、加卡轨器
B、加固防滑措施
C、加拉杆
D、加阀门