我国山区自然资源的优势在于:
A.面积占全国总面积的90%
B.降水丰富,土层深厚,土质肥沃
C.可开垦的耕地资源丰富
D.矿产、森林、水能资源较为丰富
答案:D
The ______ on her face told me that she was in a blue mood.
A.appearance
B.attitude
C.impression
D.expression
非专业电工接触电气设备机会少,故触电事故少。第三章建议删除