【单选题】—What a lovely toy! Who bought it for you? —I made it by _________.
【单选题】Clothing made of man-made fibres has certain advantages over made of natural fibres like cotton ,wool or silk.
【单选题】Excel 2010工作簿文件的默认扩展名为
【单选题】More _____ satellites must be sent up _____ space. [ ]
【单选题】Generally speaking, clothes made of man-made materials is less comfortable than _____ made of natural fibers like cotton, wool or silk.
【单选题】EXCEL2010工作薄文件的默认扩展名为
【判断题】Excel 2010 工作簿文件默认扩展名为xlsx
【判断题】Most of the environmental problems are man-made.()