The rain is falling _____ the sky. [ ]
A. of
B. from
C. for
答案:B
放射性131Ⅰ治疗甲亢,症状明显缓解或在治疗的 ()
A.6个月
B.3~4个月后
C.4~6个月
D.2~3月内
E.7~10天