题干
It's a great comfort to have a ____（代替）family to be with when you miss your home.
答案(点此获取答案解析）
substitute
It's a great comfort to have a ____（代替）family to be with when you miss your home.
）有多种酯类的同分异构体，其中能与FeCl3溶液发生显色反应，且苯环上有2种一硝基取代物的同分异构体是