根管预备的注意事项中,哪一条是不正确的()
A.首先测定工作长度
B.器械只能到达根尖狭窄部
C.用根管钻或锉时应逐号进行
D.每换一只器械前行根管冲洗
E.根管应尽量扩大
参考答案:E
------I think we should buy a car now so that it will be convenient for us.
------ , but do you think we have so much money?
A.You are dead right
B.You are joking
C.I don’t believe it
D.Come off it
选择礼品不必考虑的因素是()。
A.与受礼者的关系
B.送礼的原因
C.接待规格
D.受礼者的特点