是停车让行标志。
参考答案:错
解析:
这是减速让行标志。
It was ________ my father worked ________ I worked now. [ ]
A. where; that
B. wherever; where
C. that; where
D. there; where
反应C(石墨)⇒C(金刚石)是吸热反应,由此可知( )
A.石墨比金刚石更稳定
B.金刚石和石墨可以相互转化
C.金刚石比石墨更稳定
D.金刚石和石墨不能相互转化