问题
填空题
细胞内的RNA主要包括______、______和______3类。其中含量最多的是______，相对分子质量最小的是______，半寿期最短的是______。
答案
参考答案：rRNA；tRNA；mRNA；rRNA；tRNA；mRNA
搜题请搜索小程序“爱下问搜题”
细胞内的RNA主要包括______、______和______3类。其中含量最多的是______，相对分子质量最小的是______，半寿期最短的是______。
参考答案：rRNA；tRNA；mRNA；rRNA；tRNA；mRNA
| 根据课文内容选择正确选项。 |
| ( )1. What will Ms Smart buy for Lingling? ( )2. Where did they buy a bag? ( )3. What's the black bag like? ( )4. Has the green one got two pockets? ( )5. Which bag did they buy? ( )6. How many wheels has the blue bag got? | A. Books. A. Station. A. Heavy. A. No. A.The black one. A. Two. | B. Toys. B. Library. B. Small. B. Yes. B. The green one. B. Three. | C. A bag. C. Department Store. C. Light. C. I don't know. C. The blue one. C. Four. |