题目

请根据下面提示，写一篇短文。词数不少于50。        David is a visiting professor from Canada and this is his first time to come to the city of Beijing . He is fully occupied and has only one day for sightseeing. As a close friend , it is your job to arrange for this one-say tour . What place will you suggest he go and why ?        __________________________________________________________________________________________________________________________________________________________关于体内受精的顺序，正确的是①第一次卵裂开始 ②释放第二极体 ③顶体反应 ④穿越透明带 ⑤雌、雄原核的形成 ⑥核膜消失A. ①②③④⑤⑥ B. ③②④⑤⑥① C. ④⑤②①③⑥ D. ③④②⑤⑥①