有盖地坑造型通常是在软砂床上造型，而无盖地坑造型常在硬砂床上造型。
参考答案：错
Tom is _______ learning English. To learn it well, he abandons all his hobbies.
A．bound to
B．desperate to
C．bent on
D．accustomed to
下列情况不属于灼伤的是( )。
A．火焰引起的烧伤
B．高温物体引起的烫伤
C．强酸强碱引起的灼伤
D．火灾事故引起的烧伤
