这个结果算是平稳还是非平稳呢？
ADF检验是不是只有一个小于0.05（我选的α=0.05）都算是平稳？
Augmented Dickey-Fuller Test
alternative: stationary

Type 1: no drift no trend
     lag   ADF p.value
[1,]   0 -3.58  0.0100
[2,]   1 -1.72  0.0827
[3,]   2 -1.34  0.1937
Type 2: with drift no trend
     lag   ADF p.value
[1,]   0 -7.19  0.0100
[2,]   1 -3.01  0.0488
[3,]   2 -2.68  0.0943
Type 3: with drift and trend
     lag   ADF p.value
[1,]   0 -8.09   0.010
[2,]   1 -3.19   0.118
[3,]   2 -3.07   0.164
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Note: in fact, p.value = 0.01 means p.value <= 0.01