题目

Burj Al Arab（Arab Tower）, the so--called“world’s only seven--star hotel”，has over 90 per cent occupancy rate（入住率）after it opened in Dubai．     Since it opened in 1999，this sail--shaped hotel rising from the Arabian Gulf has been in mystery．This is not surprising because Burl Al Arab charges a minimum of 1000 US dollars per night and prevents non--hotel guests form entering it．     Standing 321 meters high，Burj Al Arab is the world’s tallest hotel．It has 202 suites（套房） charging from 1000 US dollars per night to 18，000 US dollars for a royal su对生物遗传和变异现象的表述正确的是（ ）A．生物的遗传现象是普遍存在的，而变异现象则不是普遍存在B．子女一定和父母的性状相同C．“种瓜得瓜，种豆得豆”、“一母生九子，九子各不同”是对遗传和变异现象的生动描述D．生物的变异现象是普遍存在的，而遗传现象则不是