下列抗击我国侵略的斗争中,属于人民群众自发进行的维护国家主权的抗争是①三元里人民抗英斗争②黄海海战中邓世昌英勇抵抗③台湾人民反割台斗争④卢沟桥守军奋起抗战
A:①②③④
B:①②③
C:①③④
D:①③
某物质t℃溶解度为60g,则在该温度下40g饱和溶液中含该种溶质 ____ .
—He's my____(brother/sister).
我国水资源分布不均,且水土资源匹配不合理,下列地区中缺水最严重的是( )
—I think teenagers should be allowed to make their own decisions when they have problems at school.
—_______. They're not calm enough, after all.