下列不符合各级公路设计交通量预测规定的是（）。

A.具集散功能的一级公路，以及二、三级公路的设计交通量应按18年预测

B.高速公路和具有干线功能的一级公路的设计交通量应按20年预测

C.设计交通量预测的起算年应为该项目可行性研究报告中的计划期通车年

D.设计交通量的预测应充分考虑走廊带范围内远期社会、经济的发展和综合运输体系的影响

Inside the computer, the operation system (of another software module called a data communication (71) )must decide which program will get control next. Each program remember, is associated (72) . a particular front -end port. If a program’s data have not yet reached its front - end buffer, there is no point giving that program control. Thus the data communication monitor sends its own (73) signal to the front -end devices next port is polled. Note that the (74) computer speed. The computer never has to wait for a terminal or a communication line. Instead, it is the expressive front - end processor that waits for the slower system (75) to respond.

（72）处填（）。

A.with

B.on

C.in

D.upon