About the trochlear nucleus（滑车神经核）, which of the following descriptions are correct ?
A.It situates in the mesencephalon. B.It is located at the level of inferior colliculus. C.It is located at the level of superir colliculus. D.It is one of the general visceral motor nuclei. E.It gives fibers to form the trochlear nerve.正确答案ABE
