题目

What does Beijing’s Palace Museum look like at night? Many people don’t know the answer to this question, as it closes at around 4:30 p.m in winter and 5:00 p.m in summer. However, to celebrate the Lantern Festival, Beijing’s Palace Museum opened its door to the public after dark——for two nights only. That’s a first in 94 years! Although people could get free tickets on the museum’s website, it was difficult to get a ticket. The website even stopped working for a while because too many people visited it at the same time. Zhang Zhifu, a 77-year-old woman, received a ticket from th20．下列实验中，选择的材料能够得到理想实验效果的是（　　）实验目的实验材料A鉴定还原性糖红色的番茄B通过模拟实验探究膜的透性渗透装置C观察质壁分离和复原白色玫瑰花瓣D观察细胞的减数分裂蝗虫受精卵A．AB．BC．CD．D