比的前项一定，比的后项与比值成反比例。
根据短文内容，从方框中选择恰当的单词完成句子。所有单词在填入前不需要进行词形转换，每个单词只能用一次，每空只能填一词。
young go walk their late
At the weekend, many ____ people in the UK do some sports on Saturday morning, and maybe they____ shopping in the afternoon. On Sunday they get up____ . They usually see friends and have lunch with ____ family on that day. In the afternoon they sometimes go for a ____ . But on Sunday evening, it’s time for homework.
如图所示的电路中，A、B、C是三个相同的灯泡，L是自感线圈，其电阻可忽略不计．电键S先闭合然后再断开．则（ ）
将一个直角三角板和一把直尺如图放置，如果∠α=43°，则∠β的度数是（ ）
