Where will Mr. Baily go on July 20？
A. To the company anniversary party
B. To KMC hospital
C. To Ms. Bell"s company auditorium
D. To the local charity concert
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What is NOT indicated about ESS？
A. Its Web site is in the process of being updated.
B. It improves the efficiency of water use.
C. It was created 3 years ago.
D. It can help gardeners save money.
The word "conditions" in paragraph 2, line 5 is the closest in meaning to
A. predictions
B. circumstances
C. requirements
D. provisions
近年来，企业之间的竞争非常激烈，企业所处的行业与环境都趋向复杂、动态与不确定的发展中。为了保证企业可持续发展，基于环境的变迁和自身资源与能力的变化，有必要对原有战略进行重大调整，实施战略变革。请回答
(1)企业变化的层次有哪些？
(2)战略变革的时机如何选择？
企业战略的基本构成层次是哪些？请简述各自的主要内容及互相之间的关系。
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