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问题 单项选择题

工字形截面梁受压翼缘，保证局部稳定的宽厚限值对Q235钢为b1/t≤15，对Q345钢，此宽厚比为( )。

A．小于15
B．大于15
C．等于15
D．无法确定

答案

参考答案：A

解析：梁受压翼缘外伸宽度与厚度之比为[*]

单项选择题

Ravencroft Supplies is estimating its weighted average cost of capital (WACC). Ravencroft’s optimal capital structure includes 10 percent preferred stock, 30 percent debt, and 60 percent equity. They can sell additional bonds at a rate of 8 percent. The cost of issuing new preferred stock is 12 percent. The firm can issue new shares of common stock at a cost of 14.5 percent. The firm’s marginal tax rate is 35 percent. Ravencroft’s WACC is closest to:()

A. 12.3%.

B. 13.3%.

C. 11.5%.
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单项选择题

UG支持两键鼠标及三建鼠标，用于选择屏幕上的对象的是（）

A、鼠标左键

B、鼠标右键

C、鼠标中键

D、其他
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