平面交叉只能用于二级及二级以下公路
参考答案:错
The parade was so wonderful that I couldn’t_______ photos.
A.stop taking
B.to stop taking
C.to stop to take
D.stop to take
下列变化中,属于化学变化的是( )
A.水结成冰
B.活性炭吸附色素
C.煤的干馏
D.石油的分馏