This newly designed house obtains all its energy from( ) resources, which provides aendless supply.
· natural
· renewable
· scarce
· abundant
出自:运营管理

完成拼图验证

按住下方滑块,将拼图拖到缺口处后松开。

拼图背景,将小拼图拖到缺口处
向右拖动滑块