题目

三峡工程不仅是世界上最大的水利枢纽工程，而且三峡库区还是自然资源及其丰富的宝库。据调查，三峡库区自然生长的观赏植物约有500种，比库区里生长的可食用植物少 。三峡库区里生长的可食用植物约有多少种？（用方程解） 答案：解：设三峡库区里生长的可食用植物约有x种。 （1- 1161 ）x=500 5061x=500 x=500÷5061 x=610 答：三峡库区里生长的可食用植物约有610种。(二)根据对话内容，从方框中选择恰当的句子将对话补充完整。Waitress: Here's the menu. (A few minutes later)1Mr Yang: Sure. We’d like a roast duck and vegetable soup.Waitress：Which kind of drink would you like,beer or soft drink?Mr Yang： 2 Mrs Yang：I think HI have a cup of tea. Waitress：Anything else?Mrs Yang： 3 Waitress：OK. Thanks for your order.(Forty minutes later) Mr Yang： 4 Waitress:Let me see. It's ¥85.Mr Yang：Here you are.Waitress： 5 Thanks for coming!   A. May I have the bill,please?   B. Two bowls of rice.   C. Here's your change.   D. May I take your order?   E. I'd like a bottle of beer.