患甲状腺肿大是边远山区常见的地方病,下列元素对该病有治疗作用的是 ( ) A.钠元素 B.氯元
E In 1939 two brothers, Mac and Dick McDonald, started a drive-in restaurant in San Bernadino, California. They carefully chose a busy corner for their location. They had run their own businesses for
将一定量Cl2通入250 mL KBr溶液中,反应后将溶液蒸干,测知所得的固体中含溴元素10 g,且K+与Cl-的物质的量比为2∶1。试求:(1)通入Cl2的体积(标准状
—______ is it from your home to the school?—About ten minutes’ walk.A.How farB.How longC.How oftenD.How soon
在我国,国家对个人所得征收税收的税种是 A.增值税 B.资源税 C.个人所得税 D.财产税
下图诰示中获得进士出身金榜题名的人是通过什么途径( ) A.毛遂自荐 B.立军功授爵 C.凭才
读图回答下列问题 (1)此图为我国的__________地区 (2)填出图中字母所代表的地形名称: A.__________ B.__________ C.__________