强心苷治疗心房纤颤的机制主要是()
A.延长心房不应期
B.缩短心房有效不应期
C.抑制窦房结
D.减慢房室传导
E.直接抑制心房纤颤
参考答案:D
My uncle’s house in the downtown area is much smaller than ours, but it is twice
______expensive.
A.as
B.so
C.too
D.very
一般来说焦化装置控制焦化柴油的哪些质最指标?