什么是溴价？
参考答案：
100克油品中所含的不饱和烃通过加成反应，全部变成饱和烃所需的溴的克数称为溴价。
根据句意及首字母或汉语提示完成下列句子。
1. I was supposed to a at 7:00, but I arrived at 8: 00.
2. He k his wife and children saying goodbye.
3. It's polite to shake h with others in China.
4. What are people in our country (应该) to do when they haven't met for a long time?
5. His______(习惯) is to get up early and have a cold bath.
我国票据法规定对于定日付款、出票后定期付款，或见票后定期付款的汇票，持票人应当在自到期限日起______内，向承兑人提示付款。
A．3日 B．5日C．10日 D．15日
