A:CaCO3在水中溶解度很小,其导电能力很弱,所以CaCO3是弱电解质
B:CaCO3在水中溶解度很小,但溶解的CaCO3全部电离,所以CaCO3是强电解质
C:氯气和氨气的水溶液导电性都很好,所以它们是强电解质
D:水难电离,纯水几乎不导电,水是非电解质
——Mr. Li will check our homework this afternoon. ______ you _______ it?——Not yet. I'm doing it right now.
观察下列算式:
①1×5+4=32,
②2×6+4=42,
③3×7+4=52,
④4×8+4=62,
…
请你观察规律解决下列问题。
根据句子意思,用括号中所给汉语提示或英语单词的适当形式填空。在答题卡标有题号的横线上,写出空缺处所填单词的正确形式。⑴The workers told the police their ____ (老板) name.⑵In his ____ , he passed away peacefully in his dream(九十).⑶The kids couldn't stop____ when they saw their favourite Disney characters (尖叫).⑷The foreign visitors____ come from North America (大部分).⑸The door is wide enough for three people to walk____ at the same time (通过).⑹I wonder how much a panda usually ____ (weight) when it is born.⑺Tom is such a ____ boy that he always tells a lie when he makes a mistake (honest).⑻The neighbours lost ____ (they) in the strange city.⑼The plan they are talking about ____ (need) improving.⑽He had his computer ____ (fix) shortly after it broke down.