英文猜谜题:This person plays in films.This person keeps the streets clean.

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• 读句子,填单词1.It is smaller than a river.（6个字母）6.It is made from water vapour.（5个字母）7.It falls from the clouds.（4个字母）8.He helps people be safe.（9个字母）9.It warms our planet.（4个字母）2.This person plays in films.（5个字母）3.This person keeps the streets clean.（8个字母）4.This person reports the news.（8个字母）5.This person works in a store.（11个字母）
• 英文猜谜题:This person plays in films.This person keeps the streets clean.
• 根据解释写单词 This person keeps the streets clean.
• 根据解释写单词 This person keeps the streets clean.
• 英文猜谜题:This person plays in films.This person keeps the streets clean.
• 英语翻译1,it is made fron water vapour2,this person plays in films3,this person keeps the streets clean4,this person reports the news5,this person works in a store6,it is made from water vapour7,it falls from the clouds8,he helps people be safe9it warms our planet10,it is smaller than a river
• 已知x/y=3/4,求2x-y/x+y的值.
• 分解因式2a（x2+1）2-2ax2=_．