Would you like to join in playing a football match with us?
A:have fun with
B:catch up with
C:come up with
D:take part in
①一定的标准、法则或习惯。____
②指探望人或地方。____
③脸上的气色一点都没有改变。形容遇到危险时很从容镇定。____
图所示曲线表示人体血液中某些物质含量的变化情况,下列说法错误的是( )