患者因急性牙髓炎局麻下开髓，如使用 2%的利多卡因，最多不能超过
A．10mlB．20mlC．30mlD．40mlE．50ml
参考答案：B
In my opinion, life in the twenty-first century is much easier than ____.
A．what used to be
B．that it used to be
C．it used to be
D．what it used to be
法人、自然人、公民都是有生命的人。 ( )
