It was in such a good place ______ everyone wanted to go and visit ______ I came across the old lady.

A．that; that

B．where; as

C．as; that

D．as; as

多普勒方程式中血流速度与夹角余弦（）。

A.成正比

B.成反比

C.无关系

D.的平方成正比

E.的平方成反比