This is the factory ____ we worked a year ago.
A.where
B.that
C.which
D.on which
答案:A
对急性心肌梗死患者,诊断是否存在左心室衰竭()。
A.测定肺毛细血管楔嵌压
B.测定肺动脉压
C.测定中心静脉压
D.测定主动脉与左心室压力差梯度
E.测量四肢动脉压
简述中世纪的美术特征?