— Hi, Tom. Is your sister as active as you?— No, she's a quiet girl. She is ________.
A:less outgoing than I
B:not so calm as I
C:more active than I
下列各组物质中,都是由极性键构成为极性分子的一组是( )
③不良情绪容易出现 ④产生了与同龄人和父母平等交往的需要
⑤性机能发育成熟
图1漫画告诉我们()