题目内容：
Participants in the trials were happy when they were stopped early．
参考答案：
答案解析：
单选题：Participants in the trials were happy when they were stopped
- 题目分类：卫生类
- 题目类型：单选题
- 号外号外：注册会员即送体验阅读点！
John was irritated by the necessity for polite conversation.
John was irritated by the necessity for polite conversation.
The ice is not thick enough to bear the weight of a tank.
The ice is not thick enough to bear the weight of a tank.
Please do not hesitate to call me if I can be of further ass
Please do not hesitate to call me if I can be of further assistance.
不以标的物的交付为成立要件的合同是（ ）。
不以标的物的交付为成立要件的合同是（ ）。
根据《重大建设项目档案验收办法》的规定，项目档案验收组可以采用（ ）的方式，对项目档案进行检查。
根据《重大建设项目档案验收办法》的规定，项目档案验收组可以采用（ ）的方式，对项目档案进行检查。