网络游戏设计主要包括下列哪些特点？（）
A. 社交特征
B. 目标渐进
C. 正性强化
D. 即刻反馈
成瘾被定义为一种慢性复发性的脑疾病。
A. 对
B. 错
French people take great pride in their nation’s culinary reputation.
A. 对
B. 错
The French tend to buy fresh meat from the supermarket, where they can inspect the piece before purchasing it.
A. 对
B. 错
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