Our school was offered________by the local government,which delighted all of us.[ ]

A. many equipments  

B. much equipment

C. lots of equipments  

D. a number of equipment

关于牙刷，下列哪一条是错误的( )

A．牙刷的刷头要适合口腔的大小
B．牙刷毛太硬容易损伤牙齿及牙龈
C．儿童、老年人或牙周疾病患者宜选用刷毛较软的牙刷
D．牙刷毛太软不能起到清洁牙面的作用
E．猪鬃毛牙刷较尼龙丝牙刷好