Robert ______ business two years ago, but he didn't get along well at first for ______ experience. [ ]

A. took up; lack of

B. put up; short of

C. set up; need of

D. pick up; want of

公路工程技术标准中按多孔跨径总长、单孔跨径定义的大桥跨径范围是（）。

A．多孔跨径总长大于1000m，或单孔跨径大于150m

B．多孔跨径总长大于1000m，且单孔跨径大于150m

C．多孔跨径总长大于或等于100m且小于或等于1000m，或单孔跨径大于或等于40m且小于或等于150m

D．多孔跨径总长大于或等于30m且小于或等于100m，或单孔跨径大于或等于20m且小于或等于40m