题目

Complete the following passage with the words or phrases in the box. Each word can only be used once. (将下列单词或词组的序号填入空格。每空格限填一词／词组，每词／词组只能填一次) A. whether B. smiled at C. laughs D. inside E. everyone F. produce G. nervous Today was my first day in a university! I could not believe my eyes because it just seemed like one big dream to me. I was very glad that I was attending a university, but since it was my first time at a university as a student, I was 【1】 and not sure what to except. I couldn’t stop thinking about m下列说法错误的是（　　）①硝化细菌、霉菌、水绵的细胞都含有核糖体、DNA、RNA；②能进行有氧呼吸的细胞一定含有线粒体，含线粒体的细胞每时每刻都在进行有氧呼吸；③人的一生中，细胞分化的高峰期在青春期；④细胞分化使各种细胞的遗传物质有所差异，导致细胞的形态和功能各不相同；⑤蛙红细胞、人脑细胞、洋葱根尖分生区细胞并不都有细胞周期，但这些细胞的化学成分都在不断更新． A、①②③④B、②③④⑤C、②③④D、①②④⑤