土的饱和度Sr=（）时，为完全饱和状态；当Sr=（）时，为完全干燥状态。

What a pity! I hear they _______ the tickets for the concert.[ ]

A. have sold out  

B. are selling out  

C. sold out        

D. had sold out

原油蒸馏过程中降低压力可以降低（）。

A、馏程

B、油品的干点

C、原油的蒸馏时间

D、原油中各组分的沸点

常用的装配吊具有哪些？

A company is planning a new issue of $100 par preferred stock with a 12 percent dividend. The preferred stock can be sold for $95 per share and the company must pay flotation costs of 5 percent of the market price. Assuming a marginal tax rate of 40 percent, the after-tax rate of 40 percent, the after-tax cost of the preferred stock is closest to:（）

A. 8.0%.

B. 12. 6%.

C. 13.3%.

货币作为独立的价值形态进行单方面转移时，执行（）

A、价值尺度职能

B、流通手段职能

C、贮藏手段职能

D、支付手段职能