题目

请从以下选项（A、B、C、D、E和F）中选出符合各段意思的小标题, 选项中有一项是多余选项。Travel Tips for Holidays AbroadEveryone loves holiday abroad. They give us the chance to see some sights, have some fun and relax. However, holidays aren’t always a great experience. Follow these tips to make sure you enjoy your holiday.【1】Have you packed your passport? Your tickets? Every year, thousands of people miss flights because they've forgotten their passport, they arrive at the airport too late, or even go to the wrong airport.【2】How much do you know abo阅读下面语段，按要求回答问题研制大型飞机投资大、周期长，不确定因素多，是一项极其复杂的系统工程，面临许多风险和困难，任务十分艰巨。要生产安全可靠、具有市场竞争力的大型飞机，并实现产业化，需要我们做许多艰苦细致的工作。 作者接下来最有可能强调的是。A.研制大型飞机的投资和周期B.研制大型飞机的工程复杂性C.如何实现大型飞机的收支平衡，并最终实现盈利D.如何做好研制大型飞机有组织的实施工作