题干

下列关于强、弱电解质的叙述中,错误的是(   )

A:强电解质在溶液中完全电离,不存在电离平衡

B:在溶液里导电能力强的电解质是强电解质,导电能力弱的电解质是弱电解质

C:同一弱电解质的溶液,当温度、浓度不同时,其导电能力也不同

D:纯的强电解质在液态时,有的导电,有的不导电

上一题 下一题 0.0难度 选择题 更新时间:2012-12-18 03:02:16

答案(点此获取答案解析)

B

同类题4

阅读下面短文,从短文后各题所给的四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项。

    One rainy afternoon I was sitting at home feeling so bored.1 feeling sorry for myself, I wanted to meet people and have new2, so I decided to start volunteering. I found a website where I could volunteer on a farm in France.

    Volunteering 3 so many opportunities to have fun and share 4stories. It was the first time for me to work on a farm. It was almost a(n)5holiday as food and accommodation were provided. It was not one6 holiday, however, as I had to 7 fifteen horses and sheep! I soon discovered that I was a(n) 8 farmer but it did not matter because I made some great friends and also improved my9.

    However, you do not 10 go abroad to volunteer. I have had plenty of adventures at home as volunteering can become a11. For example, I love12 so I had a good laugh waving my arms in order to 13my local choir(合唱团). At university, I organized a concert for charity with my friends. It was really 14 to find bands and raise money for a cause.

    It is true that you feel good volunteering but there are also other 15.I once volunteered as a steward (干事) at a charity sports event where the organizers 16 gave me cupcakes from an expensive London bakery to thank me for my 17. I also volunteered in a charity shop so I found loads of nice cheap clothes to 18my wardrobe(衣橱).

    While this is all fun, my favourite aspect of volunteering is 19and sharing stories. My terrible20  at farming has given me funny stories to tell!

同类题5

先进的中国人为了寻求救国救民的真理,不断向西方学习,开始了中国的近代化。阅读下列材料,回答问题。

材料一  暨道光二十年,林文忠公始译洋报,为讲求外国情形之始。著名历史学家范文澜也称“林文忠公”是近代中国“开眼看世界第一人”。

——冯忠辉《近代前期主要政治派别与中国文化的走向》

材料二  “复(严复)殚心著述,於学无所不窥,举中外治术学理,靡不究极原委,抉其失得,证明而会通之。精欧西文字,所译书以朅辞达奥旨。”

——《清史稿》

材料三  中日和约十一款,全权大臣既画押,电至京师,举国哗然,内之郎曹,外之疆吏,咸有争论,……初则广东举人梁启超联名百余,湖南举人任锡纯、文俊铎、谭绍裳各联名数十,首诣察院,呈请代奏。

——《中国通史参考资料》

材料四  ……西洋人因为拥护德、赛两先生,闹了许多事,流了多少血,德、赛两先生才渐渐从黑暗中把他们救出来,引到光明世界。我们现在认定,只有这两位先生可以救治中国政治上、道德上、学术上、思想上一切的黑暗。

——陈独秀《本志罪案之答辩书》

材料五  近五十年来,中国人渐渐知道自己的不足。……第一期,先从器物上感觉不足。……第二期,是从制度上感觉不足。……第三期,便是从文化根本上感觉不足。

——梁启超《五十年中国进化概论》