试述血浆脂蛋白超速离心法，脂蛋白密度由大到小顺序是

A．LDL>VLDL>CM>HDL

B．HDL>LDL>VLDL>CM

C．VLDL>LDL>HDL>CM

D．CM>VLDL>LDL>HDL

E．HDL>VLDL>LDL>CM

—Does she have a tennis racket?   

—                                 [ ]

A. Yes, she has.    

B. No, she hasn’t.    

C. Yes, she does    

D. No, she does.