What is one of the findings of the survey' conducted by Katz Business School？
A. Superiors tend to be better communicators than their inferiors.
B. Poor communication skills can cause a loss of confidence.
Communication skills are crucial to one's professional success.
D. Modern businesses are in great need of efficient managers.
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关于合同履行的一般规则，表述正确的是()。
A. 合同履行的主体是债务人，债务人必须有行为能力
B. 同一债务，只能约定一个履行地点
C. 当债务人的给付不足以清偿其对同一债权人所负的数笔相同种类的全部到期债务时，且当事人没有约定，则优先抵充对债权人缺乏担保的债务
D. 债务人的给付不足以清偿全部债务时，且当事人没有约定，则抵充的顺序是：实现债权的有关费用、主债务、利息
A．ButB．InsteadC．HoweverD．Likewise
A. But
B. Instead
C. However
D. Likewise
A．takenB．broughtC．exportedD．imported
A. taken
B. brought
C. exported
D. imported
整数数列a，b，c，d中a，b，c成等比数列，b，c，d成等差数列．
(1)b=10，d=6a (2)b=-10，d=6aE．
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