成人1%丁卡因表麻总量应是()
A.<9~10ml
B.<7~8ml
C.<4~6ml
D.<2~3ml
E.<1ml
参考答案:C
去括号7x3-[3x2-(x+1)]=______.
3,3,4,5,7,7,11,9,( ),( )
A.13,11B.16,12C.18,11D.17,13