【单选题】— Your mother isn't a doctor, is she? — _____. She teaches English in a middle school. [ ]
【判断题】1-17 两个电路等效,即它们无论其内部还是外部都相同
【简答题】(本小题满分13分) 已知函数 , , . (Ⅰ)求常数 的值;(Ⅱ)求函数 的最小正周期和最大值.
【简答题】Mother isn't in; sh (go)to the store.
【单选题】—Rose isn’t here today. Is she ill? —________. I saw her at the doctor’s this morning.
【单选题】Rose isn ’ t_____.She is ___She comes from Chicago.