下图中①②③④四条线分别表示北半球夏半年某日四地的太阳高度变化过程,读图后回答18—19题(h为一已知量)。③地正午太阳高度H是( )
四地的纬度从高到低排列,正确的是 ( )
Qingdao is _______ most beautiful coastal city and I think I’ll go there for _______ second time.
A beach house caught fire last night, ______seven students living in it.
____the sketch of Xiao Shenyang made a _____has been known to us all.
That Xiao Shenyang was elected_____model worker of May Day caused ____enthusiastic discussion in China.
----What do you know the _____ of are the pig influenza in humans? ---- usually similar to regular human seasonal influenza .