保鲜剂有防腐剂、杀菌剂、抗氧化剂、（）。
参考答案：脱氧剂
The climate conference was attended by 11,000 people, it the largest UN gathering ever held.
A．making
B．to make
C．made
D．to be making
世界首座以宝石矿物为主题的游乐园是哪一个？
