（）能同时局部解除冲击地压发生的强度条件和能量条件。_爱下问搜题

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问题填空题

（）能同时局部解除冲击地压发生的强度条件和能量条件。

答案

参考答案：卸压爆破

单项选择题 A1/A2型题

健康计划的总体目标中的三个"W"指（）

A.who，what，when

B.what，when，why

C.who，what，which

D.what，when，where

E.when，where，which

单项选择题

An analyst does research about a capital project and gathers the following end of year cash flow information with an initial investment of $5000:

Year	Cash Flow
1	$2000
2	$3000
3	-$1000
4	$2000
5	-$800

The company's marginal cost of capital is 6% and the project's required rate of return is 7%. The project's net present value is closest to:（）

A. -$296

B. -$371

C. -$412