I like friends who _________ friendly and easygoing. [ ]
A. is
B. have
C. are
D. has
答案:C
基准副载波必须与发送端副载波同频同相或同频反相。
影响霍奇金病预后不良的因素是()。
A.年龄≤45岁
B.女性
C.HB<105g/L
D.血清白蛋白>40g/L
E.WBC≥10×10/L