题干
Scientists across the world agree that this is an invention of _______ great significance, _______ invention that will greatly change human life.
A：a; the
B：a; a
C：/ ; the
D：/ ; a
答案(点此获取答案解析）
D
，如果一壶水可以浇3盆，那么浇完这些花，需要多少壶水？试着把这一题改编成一道用乘法算式解决的问题，并解答，你能行！ 