题目内容
池化常用的方法有_________。
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深度学习一般使用_________激活函数来实现多分类。
About twenty of us schoolchildren had been fortunate enough to receive invitations to a film-studio(电影摄影棚）to take part in a crowd-scene. Although our "act" would only last（1)___ for three minutes,we were given the opportunity to see quite a number of interesting things. Soon after we arrived,bright lights were turmed on. Since it was very hot in the studio,it came as asurprise（2)____ to us to see one of the actors put on a heavy overcoat. He (3)___ down over his eyes, put his hands in his pockets,and started walking along a winding path. A big fan began blowing（4)_____ small white feathers down on him,and soon the bare trees were covered in "snow".Two more fans were turned on,and a "strong wind" whistled through the trees. The first actor was dragging through the snow when the second, dressed (5)____ as a beggar,began walking towards him trem-bling with cold.The next(6)_____was a complete contrast.The way it was filmed was quite(7 )______. Pictures taken on an island in the Indian Ocean were shown on a glass screen. An actor and an actress stood in front of the(8) ______so that they looked as if they were at the water,s edge on the island.Since it was orn (9)_____ turn,we were left wondering what scence would be prepared for us. For the full three mintues in our lives we would be experience the (10)______ of the film "stars”！A. extraordinary B.image C. excitement D.instructions E. sceneF. dressed G.shaking H. extroordinary I.surprise J.blowingK.last L.pulled M. sequence N.anticipate O.turn
基因突变的本质是由（）
下列现象中属于可遗传的变异的是（ ）
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