After the lightning all the lights in the classroom went out.
Jack felt something approaching him in the dark.
Before he could get back to his senses, his arms were tightly bound, and his teeth had come together.
"I'm done." Remembering the rumors of vampires in school, he closed his eyes in despair.
For a long time, Jack felt that each other was leaving step by step.
If they are vampires, why don't they suck Jack's blood?
“神舟七号”航天团队________的团结精神，是“嫦娥”成功奔月的强大动力;他们求真务实的工作作风，让“嫦娥”的舞姿________完美;他们“一切为了祖国，一切为了成功”的航天精神，永恒地________在浩瀚无垠的太空。
填入横线部分最恰当的一项是：
英国一项研究发现，人只要在每餐饭前半小时喝一杯500毫升的水，并坚持3个月，体重就能减轻2至4公斤。研究团队邀请了84位超重的成人，随机分成2组，其中41位被要求在餐前喝500毫升水，另外43位则照常生活。3个月后，团队发现三餐前喝水的人，平均体重下降了4.3公斤；而餐前没喝水的人，平均体重只下降了0.81公斤。研究人员说，没有喝水的那组人，“平均运动量”比餐前饮水的人更高，这说明餐前喝适当的水真能减肥。
以下哪项如果为真，最能支持上述结论？
