题目

Bike-sharing has swept across China, with an increasing number of people choosing bike riding instead of driving. The bike that the service company provides has GPS or Bluetooth on it, and those bikes can be easily unlocked with a smart phone and left anywhere in public. Bike-sharing allows people to borrow a bike from one place and return it at another place easily.In some cities, we can see more and more people riding this kind of sharing-bikes. It’s very convenient to use the bikes if you have a smart phone. First, you have to download such an APP on your smart phone. Then what you need t下列有关细胞叙述正确的是（　　） A、溶酶体内含有多种水解酶，能吞噬并杀死侵入细胞的病毒或病菌B、核糖体是蛋白质的“装配机器”，由蛋白质和mRNA组成C、中心体在洋葱根尖分生区细胞有丝分裂过程中发挥重要作用D、酵母菌细胞不具有染色体结构