题目

阅读下面短文, 从短文后各题所给的四个选项(A、B、C、D)中, 选出可以填入空白处的最佳选项。 That summer,Luke had been my closest companion for five years.We get lots of1in our area during the summer season.Many forests are badly2by fire each year.That hot summer,not far from our shelter,a forest3 fire.It was July,and there had been a heat wave going on for three days.Luke rushed toward the forest where the fire was sending out a4heat.There was no longer any hope at that moment to wait for Luke to come back to the5. In fact,I was waiting for firefighters to tell将一个细胞中的磷脂成分全部提取出来，并将其在空气—水界面上铺成单分子层，结果测得单分子层的表面积约为原细胞表面积的两倍。则该细胞可能是（ ）①人的肝细胞②蛙的红细胞③酵母菌细胞④大肠杆菌细胞⑤人的成熟红细胞 ⑥菠菜叶肉细胞A．①⑤ B．②⑤ C．③⑥ D．④⑤