(2x-5)2-(2x+5)2.
原式=(2x-5+2x+5)(2x-5-2x-5)
=4x•(-10)
=-40x.
It is ______ that terrorism is a great threat to world peace.
A.widely accepted
B.widely accepting
C.wide accepted
D.wide accepting
属于卡马西平中毒的临床症状是
A.肌肉和中枢神经方面B.强直性痉挛或惊厥C.心电图异常D.复视、视物模糊、眼睑下垂E.呼吸不规则及呼吸抑制