The pen, _______ I had been writing for ten years, was broken.

A．with which

B．with that

C．as

D．with it

关于主动脉与肺动脉的描述，正确的是（）。

A.主动脉起自左心室，发出左、右动脉进入肺脏

B.肺动脉起自右心室，发出后分为左、右肺动脉

C.肺动脉起自左心室，发出后分为左、右肺动脉

D.主动脉起自左心室，由升主动脉、主动脉弓、胸主动脉和腹主动脉组成

E.B+D