Tom and Mary saw the mountains while they were flying over.
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* Frank thinks himself is a superstar.
* I wonder Michael walked the dog.
A.A hurricane killed eight people.B. Eight people died in a hurricane.
反相TLC检查头孢羟氨苄中有关物质时，所用固定液
A. 青霉素酶
B. 醋酸盐缓冲液(PH4.6)
C. 咪唑溶液
D. 正十四烷的正己烷溶液
E. 茚三酮溶液
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