问题
选择题
—Take it easy. There is _____ time.
—But I want to see her as early as possible. [ ]
A. little
B. plenty
C. alot
D. plenty of
答案
答案：D
搜题请搜索小程序“爱下问搜题”
—Take it easy. There is _____ time.
—But I want to see her as early as possible. [ ]
A. little
B. plenty
C. alot
D. plenty of
答案：D
，它的分子式是______________。由于它能防治坏血病，又称为_________________。在维生素C溶液中滴入紫色石蕊试液，溶液颜色变红，说明维生素C溶液具有__________性；在维生素C溶液中滴入少量蓝色的含有淀粉的碘水，可观察到的现象是______________，说明维生素C具有_______________性。