哪位皇帝的统治被现代史学家郭沫若称赞为 “政启开元,治宏贞观” [ ]
A.隋文帝
B.唐太宗
C.武则天
D.唐玄宗
答案:C
The children are loud. They laugh _________.[ ]
A. loud
B. loudly
C. happy
D. quickly
农业机械化技术推广的根本目的是?