英语选择：( ) The machine is more efficient and it's cheaper_____

英语翻译Why is it more efficient for the work cells to prepare “ 紧急求英语选择填空 1.  It is required that the machine 悬赏帮忙翻译:It is the most efficient and cost effective method. 英语翻译The transport system here is efficient .It's larger than also,imprisonment is more efficient in making the criminals And the more yousmoke it is great 英语翻译Resource management is the efficient and effective deplo Increasing the price is a practical and efficient choice. 八年级英语完形填空The problem of pollution is getting more and more s 英语选择并讲一下It was marie curie who __redium and __ X-ray machine The machine writes words ,and this is a ( ) machine I feel better and am more efficient.