第五章测试1.How is the acceleration of a particle described? （ ）。
A:Through Newtonian equations. B:none C:Through the mass flow rate and the surface integral. D:By using the material derivative.
答案:D
2.How does vorticity relate to the rotation vector? （ ）。
A:Vorticity is twice the rotation vector. B:Vorticity is perpendicular to the rotation vector C:They are the same. D:Does not matter. 3.For irrotational flow, the vorticity is zero. True or False? （ ）
A:对 B:错 4.How does vorticity relate to the rotation vector? （ ）。
A:Fourier B:Taylor C:Maclaurin D:Euler
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