28÷47×514，
=49×514，
=352．
答：这个数的514是352．
She was born _____ the morning of May12th, 1998.[ ]
A. in
B. on
C. at
D. for
长期大量使用导致严重肝损害的药物是
A．头孢类
B．糖皮质激素类
C．β-内酰胺类
D．氨基苷类
E．非甾体抗炎药
