问题
单项选择题
城市生态环境问题的主要表现形式是( )
A．生态环境污染
B．生态结构变化
C．生态物种减少
D．生态链断裂
答案
参考答案：A
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城市生态环境问题的主要表现形式是( )
A．生态环境污染
B．生态结构变化
C．生态物种减少
D．生态链断裂
参考答案：A
| 根据句意,用方框内词汇填空,使句子完整、正确. | |
2. As the monitor, you must do your _______ and report the truth to the teacher. 3. We found the holiday ________ because of the bad weather. 4. It's not polite to ______ others in trouble. 5. Many students have to _______ the meaning of this word in the dictionary. |