关于太阳日、恒星日的正确叙述是()
A.一个太阳日地球要自转360°
B.一个恒星日是24小时
C.太阳日是地球自转的真正周期
D.一个太阳日比一个恒星日时间多3分56秒
参考答案:D
It is a market which sales value might be more than 10 billion yuan.
A.a market with a sales value that might be
B.a market which might be sales value
C.a market with sale value might be
D.market with sales might be a value
低碳钢拉伸时可分为弹性变形阶段,弹性-塑性变形阶段,断裂阶段。