直流串励式电动机力矩和转速之间相互变化关系是一条硬特性，俗称“牛马特性”。

请阅读下面的短文。根据短文内容从下面五个选项中选出适当的句子还原到短文中，使短文意思通顺、结构完整。
On weekdays American students usually get up at seven .Then they have breakfast .小题1:_______. After breakfast they go to school on foot or by school bus.  Some students ride bikes .小题2:_____ . Then they put their schoolbags in the desks and take only one book ,a tablet and a pencil to every class . In high school students have classses for six hours .
小题3:___ . They usually have meat, vegetables, fruit ,bread and a drink . In the afternoon they have classses until three o’clock. Then they go home .
Students usually play or watch TV before(之前) supper . 小题4:________. After supper they do their homework . Sometimes they talk with their parents .小题5:_____ , and have a big dinner at one in the afternoon .

They go to school at about half past eight . They usually have eggs ,bread ,fruit and some milk . They have supper at six in the evening . At noon students have lunch at school . At weekdays they often go to church（教堂）with their parents in the morning .