成人中最常见的颌骨骨髓炎感染途径为（）

A.牙槽脓肿

B.冠周炎

C.拔牙创感染

D.血行感染

E.牙周炎

根据句意及所给首字母提示，在空白处填人一个适当的词。

小题1:There are some books on the t       of the box.

小题2:Sauce is a kind of r     

小题3:On Thanksgiving Day, Americans like to eat t__

小题4:As we all know, fast food is very p       in Western countries.

小题5:Please follow the cook’s i     to make a banana milk shake.