判断急性牙髓炎上下牙位须用到的方法是（）
A.麻醉试法
B.X线检查
C.染色法
D.诊断性备洞
E.电诊法
参考答案：A
–Jim likes listening to pop music.
-- .
A．So does Helen.
B．Also is Helen
C．Helen likes also
D．So Helen does
The construction of the Erie Canal encouraged westward migration and helped populate the frontier.
