面是鸡的受精卵及其胚胎发育的结构示意图,请据图回答问题:
下列地理现象与西北干旱特征无关的是( )
① Are these all ours? ____ A. It is Zhang Peng's.
② Whose is it? ____ B. Yes,it is.
③ Is this yours?____ C. Yes. they are.
在炎热的夏天,我们常会看到当打开冰箱冷冻室的门时,有许多“白气”涌出。下面关于此“白气”的说法中正确的是( )