改错题

A(The number of time) an object B(is magnified by) a telescope C(can be determined) by someone D(who knows) the focal length of the objective lens and of the eyepiece.

它的解释是改为The number of times,因为mangify（放大）的倍数（time)应该大于1，故必须用复树。

我还是看不很懂它的解释。

这个踢我理解错了

答案说的很对

A(The number of time) an object B(is magnified by) a telescope C(can be determined) by someone D(who knows) the focal length of the objective lens and of the eyepiece.

李豪答： 选择A： 改为The number of times

本句大意是： 物体被放大镜放大的倍数，可由某个掌握物镜的焦距和目镜的焦距的人确定。