哪一种牙轮钻头牙齿更适合钻硬地层()。
A.铣齿
B.镶齿
C.长方形齿
D.三角形齿
参考答案:B
As a result of the report many villagers rushed to the mountain_______ gold.
A.in search of
B.in the search of
C.to search
D.searching
下列哪项是感染性的病理性黄疸()
A.新生儿溶血病
B.新生儿肝炎
C.胆道闭锁
D.药物性黄疸
E.母乳性黄疸