词汇练习

Some botanists hypothesized that the living cells of plants acted as pumps. But many experiments demonstrated that the stems of plants in which all the cells are killed can still move water to appreciable heights.
　　The word "demonstrated" is closest in meaning to which of following?
　　(A) ignored
　　(B) showed
　　(C) disguised
　　(D) distinguished

参考答案

正确答案:B