问题
填空题
在一定的地域内，___________所形成的统一整体叫生态系统。
答案
生物与环境
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在一定的地域内，___________所形成的统一整体叫生态系统。
生物与环境
| 用方框中所给单词的适当形式填空。 | |
2. The sun was ________ when we got to the top of the mountain. 3. With the ________ of economy, people in China are living a happy life. 4. It is ________ to make great progress in English if you don't try your best. 5. Xiao Ming has ________ his special ability by making a model ship for others. |