2008年热播的电视剧《闯关东》中提到，“朱开山一家……将山东较为先进的农耕技术传授给了当地人，当地人也与他们结成了生死弟兄。”朱家传过去的农耕技术中使用的工具基本定型的组合，正确的是

3÷7的商用循环小数表示，这个小数的小数点后面的第199位上的数字是____．

下面两则材料是一位先秦思想家在评论两位政治人物时表达的意思。这位思想家可归类（    ）

在一个远离大陆且交通不便的海岛上，居民中有人患有甲种遗传病（基因为A，a）．岛上某家族系谱中，除患甲病外，还患有乙病（基因为B，b），两种病中有一种为血友病，请据图回答问题：

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B
    I went to Paris last August．I went there with my friend Jeff．We went by train．We stayed for five days in a small hotel in the center of Paris. The hotel was not expensive .Our room was OK—it was old，but very clean.
    In the mornings we visited all the famous tourist sights(著名的旅游景点)and museums．The Louvre Museum was my favorite ! We usually had some bread for lunch in a park．In the afternoons we walked around Paris．We took a lot of photos! And we had crepes! They were delicious! After a little sleep and a shower, in the evenings．We had dinner in small restaurants and then we went to pubs(酒吧)．We met very interesting people! We also made some good friends．
    We didn't buy any gifts．Everything was very expensive．But we sent(邮寄)very beautiful postcards(明信片)to our friends．We had a lot of fun ! It was an excellent holiday!
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