蹄部手术前,蹄浴应选用的消毒液是()
A.0.1%新洁尔灭溶液
B.2%煤酚皂溶液
C.2%~4%硼酸溶液
D.70%酒精
E.4%硫酸铜
参考答案:B
Mr. Green is rich. He ______ his dog ______ meat.[ ]
A. feed, on
B. feeds, on
C. give, to
D. feeds, for
合成洗涤剂中表面活性剂的毒性较大者为()
A.特殊性
B.两性型
C.非离子型
D.阴离子型
E.阳离子型