汞中毒驱汞治疗的首选药物是()。
A.依地酸二钠钙
B.亚甲蓝
C.抗坏血酸
D.谷胱甘肽
E.二巯基丙磺酸钠
参考答案:E
___________ with the size of the whole earth, the biggest ocean does not seem big at all.
A.Compare
B.Comparing
C.When compared
D.When comparing
一般情况下碳的质量分数为0.95%~1.15%的属()
A.低碳
B.中碳
C.中高碳
D.高碳于