全相似定律
参考答案：水面船舶的总阻力系数是雷诺数和傅汝德数的函数，若能使实船和船模的雷诺数和傅汝德数同时相等，就成为全相似。
It took _____ building supplies to construct these energy-saving houses. It took brains, too. [ ]
A. other than
B. more than
C. rather than
D. less than
如何防止液压系统又油温过高？
