阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。
What is the most popular communication tool today? ____your answer is QQ or MSN, I must say you are a bit old fashioned. Today, a new form of communication “Wechat”, which ____ (own) a Chinese name Weixin, is becoming the most influential text and useful tool all over the world.
What advantages do Wechat have? First, Wechat is ____relative cheap way of communication; that is to say, it uses network traffic instead of telephone fare. Next, we can know ____is going on at any time. And we can have ____ (easy) access(通道) to information available than other messaging tools.
What roles does it play ____ our daily life? According to the latest report, the registered (登记的) users on Wechat platform has topped 200 million and expanded its business to overseas market. Can you imagine that a mobile phone “app” is so ____(attract) that it reaches 200 million users within 8 months? Wechat itself has become the most popular mobile chat application in the world. A large ____ of people have become “Wechataholic”, which means they keep staring at the mobile phone all the time and can't live without ____.
However, while enjoying its great convenience, people should not ignore the danger of ____ (cheat), for information on Wechat is publicly known.
2Z(g);正反应放热。从反应开始经过t1后达到平衡状态,t2时由于条件改变,平衡受到破坏,在t3时又达到平衡,据下图回答:从t2→t3的曲线变化是由哪种条件引起的（ ）