【单选题】【消耗次数：1】
I _______ sleep very well, but then I started doing yoga and it really helps.
①
didn’t use to
②
used to
③
was used to
④
wasn’t used to
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【判断题】
科技道德规范是调节人们所从事的科技活动与自然界、科技工作者与社会以及科技工作者之间相互关系的行为规范，是在科学活动中从思想到行为应当遵循的道德规范和准则的总和。
①
正确
②
错误