下列不属于热力环流实例的是（　　）

如图，导体AB在做切割磁感线运动时，将产生一个电动势，因而在电路中有电流通过，下列说法中正确的是（   ）

B

    These days, we see a lot of shopping festivals(节日). Singles' Day is a big one for Chinese shoppers. It's on November 11^th(11月11日). In the US, Black Friday is the most well-known one.

    Black Friday is always on the day after the Thanksgiving holiday(感恩节). On this day, stores(商店) give special deals(特价). Shoppers get up very early. They wait in line in front of the stores at 2 or 3 am before the stores open. Sometimes there are too many people. They can't get inside the store. Black Friday is not the only shopping festival in the US. Another one is CyberMonday(网络星期一). This day is always on the Monday after Thanksgiving.

    Personally, I don't like these holidays, because they put too much importance（重要性）on buying things. And that's a trend of over-consumption(过度消费). What do you think of these holidays?

“夏收期间遇上了少有的好天气。南苑乡顺利完成了小麦收割任务”，说明的是（     ）

1904—1905年，日本和俄国发生战争，最终日本战胜俄国。对此，一些中国人当时就发表评论，认为这场战争“非军队之竞争，乃政治之竞争。卒之日胜而俄败，专制立宪，得失皎然”。下列分析，正确的是 ①俄国失败的根源在于农奴制  ②日本明治维新实现富国强兵   ③这些中国人赞成君主立宪 制   ④这场战争直接引发十月革命