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问题 多项选择题

资源的不可模仿性是竞争优势的来源，也是价值创造的核心。资源的不可模仿性主要有以下形式（）。

A.物理上独特的资源

B.具有路径依赖性的资源

C.具有因果含糊性的资源

D.具有经济制约性的资源

答案

参考答案：A, B, C, D

解析：资源的不可模仿性主要有以下4种形式：（1）物理上独特的资源；（2）具有路径依赖性的资源；（3）具有因果含糊性的资源；（4）具有经济制约性的资源。

单项选择题

在进入设备内作业前（）min必须取样分析。如果在设备内作业时间长，至少每（）h分析一次。

A.30；1

B.30；2

C.20；1

D.20；2
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单项选择题

Many word processing programs include spell checker. It checks the spelling of every word in a (120) by looking up each word in its dictionary. If the word does not appear in the dictionary the user is (121) to possible misspelling and possible corrections are often (122) . Spell checker does not recognize unusual people names or specialized terms, but it will often allow you to create your own personal dictionary of specialized words you often use. Spell checker is a valuable aid to proofreading, but it can not catch the (123) of one correctly spelled word for another (such as form for from). Thus it does not (124) a document is free of spelling errors.

A．document

B．equipment

C．program

D．statement
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