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问题 多项选择题

建井期间应当尽早形成永久的（）等系统。未形成上述永久系统前，必须建设临时系统。

A.供电

B.提升运输

C.供排水

D.通风

答案

参考答案：A, B, C, D

单项选择题

A manufacturing firm reports the following in its financial statements: Gross plant and equipment $ 2700000 Depreciation expense$ 235000 Accumulated depreciation $1850000 The average depreciable life of plant and equipment is:

A．

A. 7.87 years.

B．

B. 3.62 years.

C．

C. 11.49 years.
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名词解释

年休假
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