单选题
What does the author imply by saying "living space.., is figured.., also in cubic volume above the earth" in the third paragraph?
A、
Our living space on the earth is getting smaller and smaller.
B、
Our living space should be measured in cubic volume.
C、
We need to take some measures to protect space in volume.
D、
We must create better living conditions for both birds and animals.
【正确答案】
D
【答案解析】
[解析] 从最后一段结尾处可知“我们要努力为人类以及人类的朋友维护良好的生存环境”。
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