题目

       Planning a visit to the UK? Here we help with ways to cut your costs.        AVOID BIG EVENTS  Big sporting events, concerts and exhibitions can increase the cost of accommodation and make it harder to find a room. A standard double room at the Thistle Brighton on the final Friday of the Brighton Comedy Festival (19 Oct.) cost £169.15 at Booking.com. A week later, the same room cost £118.15.        If you can be flexible and want to know dates to avoid—or you’re looking for a big event to pass your time—check out sites such as Whatsonwhen.com, which all下列关于氧气的说法正确的是A.实验室常用电解水的方法来制取氧气B.夏天食物腐烂与氧气无关C.氧气的化学性质比较活泼，与很多物质发生反应D.氧气可以作为发射火箭的燃料