萘、松香、食盐、玻璃中，要在一定温度下才能熔化的是________，没有一定熔化温度的是________，
萘、食盐；松香、玻璃
根据汉语提示填入正确的单词。
1. Students in Xinjiang go to school from _________ (四月) to _________ (九月).
2. June _________ (一日) is Children's Day. All the children are very _________ (高兴).
3. The _________ (老的) man is _________ (九十) years old now.
钢筋工作为什么不着人喜爱？
