多生牙的发生率为（）
A.小于1%
B.1%～3%之间
C.大于3%
D.大于5%
E.大于10%
参考答案：B
He is so strongly built that he looks _______ he could lift an elephant.
A．if
B．as if
C．like
D．that
硝酸铵
