What we need to do for the Chinese civilization is not to lie on past glories, but to ________ and around.[ ]

A. look forward  

B. look up

C. look ahead  

D. look into

选择天线时，郊区通常选择增益（），水平波束（），垂直波束（）的天线

A.高，窄，窄

B.高，宽，宽

C.高，宽，窄

D.高，窄，宽