燃气热水器的热水产率不小于额定产热水能力的85%。
参考答案:错
解析:燃气热水器的热水产率不小于额定产热水能力的90%
根据句意和首字母提示完成单词。
1. Bad luck! I missed the early bus because I o this morning.
2. He ate quick breakfast and r off to work.
3. Don't forget to l the door when you leave.
4.1 had g used to eating north-style meals by the time I got to Beijing.
5. She r that he had been lying.
钟表的轴心到分针针端的长为4cm,那么经过40分钟,分针针端转过的弧长是______ cm(用π表示).