中 * * 对世界文明的发展做出了重大贡献,其中在世界上最早种植粟的是[ ]
A.元谋人
B.山顶洞人
C.河姆渡人
D.半坡人
答案:C
液压电梯液压泵站应设有压力指示,压力表的量程不应小于额定载荷时压力的()
A.110%
B.120%
C.140%
D.150%
The boy was so careless that the glass fell from his hand and it _____ on the floor.[ ]
A. broke in
B. broke down
C. broke up
D. broke out