第一个完全化学合成的HMG-CoA还原酶的抑制剂为（）

A.氟伐他汀

B.烟酸

C.肝素

D.氯贝丁酯

E.洛伐他汀

Full employment is said to occur when:（）

A. the natural rate of unemployment equals zero.

B. the number employed divided by the number in the labor force is less then 5.0 percent.

C. cyclical unemployment equals zero.