若∠α与∠β是内错角,且∠α=50°,则∠β的度数为( )
A:50°
B:130°
C:50°或130°
D:无法确定
读北半球某地区的海平面等压线图,回答下列问题。
词数:30~40。
供你参考的建议有:sing, take a walk, do sports, write the diary, watch TV, listen to music, go shopping, go swimming, go outside.