A:(﹣ 35 , 45 )
B:(﹣ 35 ,﹣ 45 )
C:( 35 , 45 )
D:( 35 ,﹣ 45 )
请仔细观察右边漫画,结合所学知识回答问题。
下列各分子式只表示一种纯净物的是( )
选择单词,补全短文
hot China winter people old east
Shanghai is the biggest city in ____.It's in the ____ of China. It's got a lot of ____.It's an ____ city. It's very ____ in summer and it's cold in ____.