改善急性左心衰竭症状最有效的药物是
A．利尿剂
B．洋地黄
C．钙离子拮抗剂
D．B肾上腺素能受体阻滞剂
E．血管紧张素转换酶抑制剂
参考答案：A
—Can you see the Jinsha Museum from________you are standing?
—Yes, and it's really well designed.[ ]
A. where
B. which
C. the place
D. here
纸页涂布加工的目的是什么？
