在净度分析中，重量为10.00～99.99g的试样称重应精确到（）。
A.4位小数
B.3位小数
C.2位小数
D.1位小数
参考答案：C
--- We need a new leader for our Helping Hands Club, but I don’t know ______. --- Why not Mary? She is always willing to help others.
A．what to choose
B．how to choose
C．when to choose
D．who to choose
最常见的鼻及鼻窦癌的病理类型是()
A．鳞状细胞癌
B．腺样囊性癌
C．肉瘤
D．淋巴上皮癌
E． * * 状癌
