27.选D考点: 倍数+名词=倍数+比较级+than...=倍数+as+原级+as 50 times their own weight 自身重量的50倍.=50 times as heavy as their own weight=50 times heavier than their own weight 29.选D因为名词前有序数词时,应用不定式作后置定语.to fly an airplane 是the first person的后置定语.the first person without arms to fly an airplane 第一位开飞机的无臂人. 34.选A考点: 动名词的被动式作主语...