A:KI→I2
B:FeCl2→FeCl3
C:CuO→Cu
D:CO2→Na2CO3
根据短文内容,完成下列各题。
Andy is studying in a school. On Monday and Friday, he has P.E. class. On Tuesday, he has music class and English corner. On Thursday afternoon, he goes to the library. On Sunday morning, he plays football with friends. On Saturday he watches TV and help mom.
中国人是黄皮肤黑眼睛,欧洲人是白皮肤蓝眼睛,决定眼球颜色的结构是( )
句子配对。
①How heavy is Tom?____ A. There are 15.
②How old is he?____B. He is 15years old.
③How much is the robot?____C. He weighs 51kg.
④How many boys are there under the tree?____D. It's September 15th.
⑤When is your birthday?____E. It's ¥15.