Tom, _____ your job to wash the dishes. [ ]
A. this is
B. that is
C. it is
D. he is
答案:C
伟大的音乐家舒伯特是()国人。
A.奥地利
B.德国
C.法国
D.波兰
地下连续墙施工槽段划分应综合考虑哪些因素?