聚四氟乙烯导轨软带具有1）摩擦特性好、2）减振性好、3）（）4）工艺性好的特点。

Why did the share prices get a shock yesterday().

A.Because the pound fell to its lowest level against the dollar.

B.Because the American currency soared to a new peak.

C.Because the Footsie slumped forty-two points.

D.Because the government increased interest rates to fifteen per cent.