对于牙本质过敏，首选的治疗方法是（）
A.药物脱敏
B.牙髓治疗
C.牙周洁治
D.垫底充填
E.树脂充填
参考答案：A
根据句意和提示写出单词，完成句子。
小题1:I don’t think the sweater belong to______(he).
小题2:---I passed the last exam yesterday.
---Oh, you’re really a ______ (luck) dog.
小题3:Lily is the ________(bad) of the girls at Maths.
小题4:We’ll have a three_________(day) holiday on Tomb Sweeping Day.
小题5:Nobody studies as (happy) as Simon. He really enjoys studying.
农业为育苗、育种而安装提高地温的电热器用电的电费电价属于（）。
