如图,a∥b.已知∠2=∠3,∠1=30°,则∠4=( )
![](https://img.xkw.com/dksih/QBM/2021/9/11/2805742403559424/2820202337984512/STEM/717a7910-9bc2-4903-afe7-855c35e911ef.png)
![](https://img.xkw.com/dksih/QBM/2021/9/11/2805742403559424/2820202337984512/STEM/717a7910-9bc2-4903-afe7-855c35e911ef.png)
A.30° | B.60° | C.90° | D.120° |
更新时间:2021-10-01 22:19:15
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