下列有关物质性质的应用正确的是( )
制作口腔上皮细胞临时装片时,需用牙签在口腔什么位置轻刮几下?( )
根据所给首,与出所缺单词。I can see a v ____ tape on the desk.Li Gang likes m ____ , but he doesn’t music.The p ____ is very good. I also want to buy one.This r____ is very big, but that one is very small.I n ____ a pen, two pencils and some books.