We found Mary's brother had ________ more story books than Ann's. [ ]

A. very  

B. too many

C. by far  

D. far

先用5％碳酸氢钠冲洗，继用清水冲洗，再用氧化镁甘油糊外涂（）

A．硫酸灼伤

B．氢氧化钠灼伤

C．氧化钙灼伤

D．苯酚灼伤

E．沥青灼伤