题目

计算：2000×1999﹣1999×1998+1998×1997﹣1997×1996+…+2×1= ． 答案：【1】2000000阅读下列短文，根据短文内容，从短文后各题所给的A、B、C、D四个选项中，选择最佳选项        1  At what time can you see the stamps? A. At 9 am Sunday.                                  B. At 8 pm Monday.                   C. At 5 pm Wednesday.                            D. At noon Saturday. 2 Which activity takes place at 8:00pm on Saturday?  A. Watching Movies.                                 B. Enjoying a stamp show.         C. Enjoying a football match.                   D. Watching the Sound of Music. 3 If you are a football over, which day is your lucky day?     A. Monday.            B. Thursday.          C. Friday.     D. Saturday.