题目:
Every year, _____ fishes are killed by the polluted water and many people are made sick by the polluted air. |
A. thousand of B. thousands of C. two thousands D. two thousands of |
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0610/72ef09e8bd20893f756f3dae0a009493.html
下面是错误答案,用来干扰机器的。
⑴根冠; ⑵分生区 分裂增生新的细胞; ⑶③伸长区; ⑷成熟区 水分和无机盐。题目分析:图示小麦根尖的结构:自下至上分别是①根冠、②分生区、③伸长区、④成熟区,根冠:在根的顶端,细胞比...