题目内容：
Treatmentforcancer mayalsobring aboutsome＿＿
参考答案：
答案解析：
单选题：Treatmentforcancer mayalsobring aboutsome＿＿
- 题目分类：卫生类
- 题目类型：单选题
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Participants in the trials were happy when they were stopped
Participants in the trials were happy when they were stopped early．
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（ ）。