10÷（40）=（15）÷60=(1)(4)=（25）%=0.25；
故答案为：40，15，14，25．
根据下列句子所给汉语意思，写出空缺处各单词的正确形式：
小题1:Earthquakes are _________(极端) difficult to predict.
小题2:He looked shocked, and then burst into _________(笑)
小题3:A crowd of 300 supporters warmly ________(鼓掌) her speech last night.
小题4:The sun had ______(使… 褪色) the curtains.
小题5:The heat and the whisky made him feel _______(眩晕) .
《供电营业规则》规定，供电企业供电的额定频率为交流（）赫兹。
