关于自然灾害的叙述,正确的是( )
A:山区暴雨往往引发泥石流
B:梅雨和寒潮大多相伴出现
C:地震可引发滑坡和崩塌
D:火山喷发可加剧气候干旱
某有机物结构简式如下:
下列关于该化合物的说法正确的是( )
(2015•四川达州)—Excuse me, could you please tell me the way to the ? I have had too much water.—Go along the street and you will find one.
下列各组物质充分混合后能得到溶液的是( )