下列哪种肿瘤仅发生于颌骨（）。

A.成釉细胞瘤

B.巨细胞瘤

C.骨化纤维瘤

D.骨瘤

E.以上都不是

Puncture leaks in the lower tubes or bottom of an inflatable liferaft should FIRST be stopped by using（）.

A.sealing clamps

B.repair tape

C.a tube patch

D.sail twine and vulcanizing kit