假期

正如我所言，
一年一度的长假又来了！
我对它可是又爱又恨啊～

这是我今天的假期PEKA……

aim : to investigate the relationship between the holiday and the cleanliness of the room.
inferences : holiday influence the cleanliness of the room.
hypothesis : the longer the holiday,the tidy the room.
manipulated variable : the "season" of schooling.
responding variable : the cleanliness of the room.
apparatus : broom
materials : plastic bag,food(kinetic energy)
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precaution : ensure receive the complaint from my parents...