题目

The young elephants each ________ as ______ as 200 kilograms , and that old one is three times as _____ A. weighs; much ; heavy                      B. is weighed; many ; much C. are weighed ; many; much                   D. weigh ; much ; heavy   答案：D   如图所示，下列有关电工钳的说法正确的是(    ) A．它由两个费力杠杆组合而成 B．手柄上的橡胶套可以防止触电事故发生 C．刀口很锋利是为了增大压力 D．橡胶套上刻有花纹是为了减小摩擦