纯液体和多数低分子真溶液在层流条件下的（）与（）成正比。
参考答案：切变应力S；切变速度D
—Did your boss phone you again the next day?
—No,it was a fortnight he gave me a second call.
A．that
B．when
C．before
D．since
汉长乐宫遗址
