以马尾松毛虫为例，说明其在分类中的位置。
参考答案：
动物界、节肢动物门、昆虫纲、鳞翅目、枯叶蛾科、松毛虫属、马尾松毛虫。
The old rules have to be _____because they only applied to the circumstances that existed when they were made a hundred years ago.
A．developed
B．established
C．observed
D．revised
A．拉细绳的力F等于钩码重力G的
B．拉细绳的力F等于钩码重力G的
C．拉细绳的力F等于钩码重力G的
D．拉细绳下降的距离是钩码上升高度的
