以下哪些物质造成的损伤不属于酸烧伤（）
A．石炭酸
B．草酸
C．甲酚
D．生石灰
E．氢氟酸
参考答案：D
What does the speaker mean().
A.Our apartment has too much furniture in it.
B.Our furniture is uncomfortable.
C.Some of our furniture hasn’t arrived yet.
上颌恒牙萌出常见的顺序是（）
A．1→6→2→3→4→5→7
B．6→1→2→4→3→5→7
C．6→1→2→3→5→4→7
D．6→1→2→3→4→5→7
E．1→2→6→4→3→5→7
