从猿到人的转变过程中,下列哪项起到了最重要的作用[ ]
A、直立行走
B、劳动
C、语言的产生
D、手的形成
答案:B
— Let's go __________ and have a look.
— Sorry. I must go __________.[ ]
A. to there, to home
B. to there, home
C. there, to home
D. there, home
圆柱度是一项综合指标,它控制了圆柱体()内的各项指标,如圆度、素线的直线度等。