2.8与4的积，减去6.5除以5的商，差是多少？
2.8×4-6.5÷5
=11.2-1.3，
=9.9．
答：差是9.9．
—My child has just passed the driving test.
—__ _.
A．It depends
B．At your service
C．Congratulations
D．It serves you right
用于内服、注射是处方药，而外用是非处方药的是
A．对乙酰氨基酚
B．布洛芬
C．西咪替丁
D．氢化可的松
E．氢溴酸右美沙芬
