If you don't know how to pronounce new words, ________in a dictionary.          [ ]

A. look them up            

B. look they up          

C. look up them            

D. look up they

在重大件货物绑扎时，应做到（）

A、绑索的加绑水平角应尽量大

B、货件左右绑索应基本对称

C、货件前后绑索也应基本对称

D、各绑索的受力尽可能均衡