A:寒潮
B:台风
C:火山喷发
D:洪涝灾害
“一个篱笆三个桩,一个好汉三个帮”。这句话说明了( )
读世界海陆分布图,回答问题 关于各大洲之最的描述,正确的是( )
Helen ______ her keys in the office so she had to wait until her husband ______ home.