【简答题】若x 2 =x,则x=______,若x 3 =x,则x=______,若x 3 =x 2 ,则x=______.
【单选题】My sister is very hard-working. She is not only good at her subjects but also she often helps my parents . [ ]
【单选题】My sister is very interested in singing, and ______.
【单选题】I'm thin, but my sister is very ____. [ ]
【单选题】命题“若x>5,则x>0”的否命题是( )
【单选题】My sister is very ______. [ ]
【简答题】长期目标是指时间跨度为______的目标,短期目标是指时间跨度在______的目标。