盐酸与块状碳酸钙固体反应时，不能使反应的最初速率明显加快的是（　　）

A．将块状碳酸钙固体换成粉末状固体

B．盐酸的量增加一倍

C．盐酸的用量减半浓度加倍

D．温度升高40°C

New York City surpassed the other Atlantic seaports in partly because it developed the best transportation links with the interior of the country.

A．part

B．partial

C．partner

D．parting