会对钢产生腐蚀的介质一般有()。
A.各种酸硷
B.大气、海水
C.盐类
D.以上都是
参考答案:D
Would you tell me what subject you were good _____ school?
A.at at
B.in in
C.for for
D.with with
溃疡疮口太小,腐肉不脱或胬肉突出者可选用()。
A.消散药
B.止血药
C.腐蚀药与平胬药
D.生肌收口药
E.提脓祛腐药