某企业计划年度产品销售收入21600千元,流动资金平均占用额为5400千元,该企业流动资金周转天数为()天。
A.120
B.90
C.60
D.40
参考答案:B
混凝土自高处倾落的自由高度,不宜超过()。
A.2 m
B.2.5 m
C.3 m
D.3.5 m
How I wish I _____ to repair the recorder! I only made it worse. [ ]
A. had tried
B. have tried
C. hadn't tried
D. didn't try