A:ω=1,φ=π6
B:ω=1,ψ=-π6
C:ω=2,φ=π6
D:ω=2,φ=-π6
如图,结合所学地理知识及“世界某半岛示意图”,回答问题.图中半岛地区河流众多,其具有的共同水文特征是( )
When you see an English film or talk with native speakers, observe their facial expressions and g____.
有关黄河的特点叙述正确的是 ( )