从898起一个一个地数，数到904．
898，____，____，____，____，____，____．
The computer, help we human beings have stepped into the information age, should be regarded as one of the most important inventions in the 20th century.
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相当于原来细胞膜表面积的两倍。用下列细胞实验与此结果最相符的是
