题目

根据句意和汉语注释，写出单词的正确形式。 1. Like many famous scientists, Li Siguang _________ (致力于) himself to the study of science. 2. _________ (医疗的) workers are badly needed in those earthquake-hit areas. 3. I don’t think the watch gives you good ________ (价值) for your money. 4. The tourists had no __________ （选择）but to wait for the next train. 5. How are you going to ___ (证明) that it is very difficult for giant pandas to survive in the wild?列表比较细菌和真菌的主要特征．项目/名称细 菌真 菌个体大小菌体结构细胞核有无生殖方式营养方式生态系统地位