已知a、b互为倒数，c和d互为相反数，x绝对值是3，求x2+（ab+c+d）x+

. — Which driver was to blame?

— Why, __________! It was the child’s fault, clear and simple. He suddenly came out between two parked cars.

A．both

B．each

C．either

D．neither

Britain is ___ of Europe.

A．in the west

B．to the west

C．at the west

D．on the west

G41指令是用来对（）进行补偿。

A．刀尖位置

B．刀尖半径

C．刀具长度

下列哪类问题不属于教师职业行为问题的类型：（）。

A.怨职型

B.自我型

C.暴戾型

D.适应不良型