给下列多音字注音：挨：敌人挨（）家挨户抢粮食，老百姓只得挨（）饿。
参考答案：āi；ái
Questions 24-30
It is implied in the passage that ______.
A．the Maces believe a good career is even more important than their family life
B．Rodney’s children are quire happy with their position in the family
C．even capable women sometimes need encouragement from their families
移频键控（FSK）调制方法是用不同的（）来代表“1”和“0”的。
A、振幅；
B、频率；
C、初相位；
D、相位变化。
