若xm=2，xn=8，则xm+n=______．

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问题填空题

若x^m=2，xⁿ=8，则x^m+n=______．

答案

∵x^m=2，xⁿ=8，

∴x^m+n=x^m•xⁿ=2×8=16．

故答案为：16．

问答题简答题

诗歌的节奏指的是什么，它有什么作用？

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单项选择题

All of followings should be done by the project manager during project control except ______.

A. Determine the a change has occurred
B. Ensure that a change is agreed
C. Make sure all changes are approved by management
D. Manage changes as they occur

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