如果驱动轮在路面滑转，则增大驱动力只会使驱动轮加速旋转，地面切向反作用力并不会增加，汽车仍不能行驶。
参考答案：对
The house rent is expensive. I’ve got about half the space I had at home and I’m paying _______ here.
A．as three times much
B．as much three times
C．much as three times
D．three times as much
关于铁剂的叙述，下列哪项是错误的：
A．主要在十二指肠及空肠上段吸收
B．对营养不良引起的贫血有效
C．急性中毒可用去铁胺解救
D．Pe2+转变为Fe3+才能吸收
E．对失血过多引起的贫血疗效极佳
