模态框出现时的transition渐变特效, 创建模态框时，是需要添加（）类
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What are the students’attitudes and reactions towards their odyssey years？
A. rebellious and prideful attitudes and behavior toward their parents
B. resent the pressure they feel
C. keep a distance from their parents
D. run away from their home
E. feel confused
F. resort to computer games，iPhones and iPads
创业的核心是（ ）。
A. 创业者
B. 创新
C. 创业机会
D. 创业资源
请问哪个不是团队？（）
A. 龙舟队
B. 旅行团
C. 足球队
D. 候机旅客
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