有关纬线的说法正确的是[ ]
A、所有纬线长度相等
B、纬线指示东西方向
C、赤道是最短纬线
D、所有纬线长度不等
答案：B
---We all had a lot of fun at the barbecue yesterday. Pity you weren’t there.
---I really should have gone with you, but I ________ on some remaining problems.
A．was working
B．would work
C．worked
D．had worked
不走行于胃脾韧带内的结构是（）。
A.胃网膜左动脉
B.胃网膜左静脉
C.胃短动脉
D.胃短静脉
E.脾动脉
