在进行数据连接时，终端应首选（）认证方式。
A.PAP
B.AKA
C.CHAP
D.UNIX-login
参考答案：C
About ________ of the workers in the factory were born in the ________.
A．two-thirds, 1970
B．two-thirds, 1970s
C．two-third,1970
D．two-third, 1970s
大展弦比的机翼（与小展弦比的机翼相比而言）将有（）
A.低失速速度
B.在大迎角时阻力会增加
C.在低空速操纵特性差
