一袋奶粉重500克,4袋奶粉重( )。
A:2000千克
B:200克
C:2千克
下列关于分子、原子和离子说法正确的是( )
我国人口分布的基本特点是( )
用方框中所给单词或词组的适当形式填空。
photo, last year, so much, be, come out
根据图画提示完成对话
Mike is a very cool boy. He very likes Chinese food. He likes ____, but he can't use ____. Mike's friend Wu Yifan lies ____. He can use ____ and ____now. Their teachers Miss White is beautiful . She likes ____and ____. She can use ____.
15-9=____
8-3=____
9+3=____
14-4=____