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We can see the above code. The code for creating div is very similar to the code for creating iframe. We can now consider separating the common code to make the code completely abstract. We can now write a set of code that is encapsulated in the getInstance function, as follows:要么主动出城投降，何去何从成为一个难题。This.technicalInterview ();The research on classification ability is more in kindergartens and more in primary schools. Research by cognitive psychologists has found that children under 0-1 years old basically have no classification ability, and they mainly rely on individual perception. The classification ability of children aged 1-3 has begun to sprout, but the concept of "category" has not yet formed. The classification of children aged 3-5 is basically still based on external perceptible dimensions such as shape and color. For example, children in small classes in kindergartens are asked to classify red plastic balls, red apples and bananas. They will divide the balls and apples together, either according to the shape (circle) or according to the color (red), but they will not put apple kernel bananas together according to the function (edible). What if you add another celery?你……你为何要把那草灰掩埋起来？还有比这更怪异的行径吗？黎章眼中喷火，逼近他怒吼道：老子埋了你都能挖出来，老子要是不埋，你还不早就吵出来了？********前天更三章，昨天更两章，都知道小葱没事了，亲们急啥呀？让原野喘口气呗。然而他刚上手做了三四个，便见两位官兵远远过来呵斥起来：防务重地。　　白流苏在白家的日子并不好过，势利的嫂嫂与兄长想方设法算计她的钱，见白流苏没钱了，就又给她冷脸。唐一元死后，唐老爷开出丰厚的价钱，希望白流苏回唐家过继一个侄子传承香火。白家众人企图让白流苏重回唐家，以解除自家困境，而宝络则劝姐姐不要守一辈子活寡。