女，8岁。右下后牙酸甜刺激痛。检查：右下第一恒磨牙近中沟墨浸状，探针被卡住。此牙诊断是
A．浅龋
B．中龋
C．深龋
D．牙髓炎
E．根尖炎
参考答案：B
—Mum, I don’t think you should buy clothes animal fur.
—Why? They look nice on me. [ ]
A. make of
B. make from
C. made of
D. made with
天然入射源核素是哪种()
A．镭-226
B．钴-60
C．铯-132
D．镅-241
E．以上都不是
