气相色谱法测定烷基汞时,水样中的烷基汞用()富集。
A.玻璃棉
B.脱脂棉
C.巯基棉
参考答案:C
This style of clothes was from _____. [ ]
A. 1980s
B. 1980's
C. the 1980s
D. a 1980's
氢氧化钙制剂可运用于以下治疗,但除外()
A.直接盖髓
B.间接盖髓
C.活髓切断
D.根管充填
E.根尖诱导成形