玉米开花时如遇到连绵阴雨，产量就会降低，其主要原因是（　　）

A．阴雨，子房不能发育

B．花粉被雨水冲落，影响风力传粉

C．风大，气温低，花粉不能成熟

D．风大，气温低，影响昆虫传粉

Whenever new information is entered, it must be stored somewhere in the computer’s (70) . RAM only (71) the data temporarily. That is, all information stored in the RAM will disappear if you switch the computer off.

A．takes

B．executes

C．erases

D．holds