不宜采用塑化疗法的是（）
A.根尖孔尚未闭合的年轻恒牙
B.乳牙
C.根尖闭锁的前牙
D.A+B
E.A+B+C
参考答案：E
The H1N1 flu, often _____ “swine flu” by the public media, is a disease which can be prevented, controlled and cured.
A．calls
B．to call
C．calling
D．called
EI32-JD型计算机联锁系统每个需要采集的继电器取用1组接点，只采集继电器的（）接点。
