有一齿轮传动,小齿轮齿数为40,大齿轮齿数152,求其传动比?
参考答案:
“良辰美景奈何天,赏心乐事谁家院”是《()》戏曲作品中的名句
根据首字母及汉语提示,完成下列单词的拼写,使句意明确,语言通顺。
1. Where do your parents l______? -In Hebei.
2. —What l________ does Tom speak?
—French.
3. The park near my home is very (脏)____________, I don't like to go there.
4. I'm very ___________(饥饿的), I want some food to have.
5. She often helps her mother with housework (在……期间) ________ the holidays(假日).