下列不是年轻恒牙的特点的是()
A.矿化程度低
B.髓腔宽大,髓角高
C.牙根未发育完成,呈喇叭口状
D.牙根形成1/2时开始萌出
E.萌出后2~3年内根尖发育完成
参考答案:D
姐妹俩共养兔100只,姐姐养兔只数的比妹妹养兔只数的多16只,问姐姐比妹妹多养多少只()
A.15
B.20
C.25
D.30
A. substantial damageB. as differentC. the terrorist attacksD. the city’s economyE. the rest of the nationF. clearly avoidableG. easily noticeable
The pain caused by the terrorist attack is ______.