问题
选择题
You don't need to teach _____ how to cook and sew. I can teach _____. [ ]
A. me, me
B. myself, myself
C. my, myself
D. me, myself
答案
答案：D
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You don't need to teach _____ how to cook and sew. I can teach _____. [ ]
A. me, me
B. myself, myself
C. my, myself
D. me, myself
答案：D
，中性点以上桩周土加权平均有效重度。按照《建筑桩基技术规范》（JGJ94—94）的规定，该桩基的负摩阻力群桩效应系数ηn应取（）。