钓鱼岛是中国的固有领土,面积约4400000平方米,数据4400000用科学记数法表示应为( )
A:44×105
B:0.44×107
C:4.4×106
D:4.4×105
I have a garden.
— Did you listen to Li Yundi _____ the piano yesterday evening?
— Yes. He played _____ and all the audience clapped loudly at the end.
青藏铁路上行驶的载客列车都是全封闭式的,关于这样设计的目的叙述不正确的是( )