如果a+19是假分数，分子最小是9；
当分子是9时，a就为8；
故选：C．
Teenagers in the 1950s, who had to ______ an increasingly atomized family life and domestic and international tensions, scorned the sterile version of American life.
A. injure B. conjure C. confront D. inflow
ZP.89型移频自动闭塞设备的低频和移频振荡电路采用什么振荡器？
