By the time our teacher arrives tomorrow,all the work _____,with which he will be satisfied.

A．is accomplished

B．will have been accomplished

C．will be accomplished

D．has been accompished

关于脊髓多发性硬化的描述，不正确的是（）

A.女性患者多于男性

B.病变部位脊髓明显增粗

C.病变位于白质

D.颈、胸髓发生多见

E.T1WI低信号，T2WI高信号