Every week, we have classes ______ Monday to Friday. [ ]
A. on
B. to
C. from
D. with
答案:C
关于肌无力综合征的阐述哪项是错误的()
A.潜伏期长达5年
B.多在50~70岁
C.与原发肿瘤有关
D.肿瘤症状早于神经症状
E.男性患者居多