心悸伴消瘦及多汗
A.高度房室传导阻滞B.甲状腺功能亢进症C.贫血D.感染性心内膜炎E.急性心肌梗死下列症状最常见于何种疾病
参考答案:B
有一边长为48cm正方形铁板,现从铁板的四个角各截去一个相同的小正方形,做成一个长方体形的无盖容器,为使其容积最大,截下的小正方形边长为( )
A.6m
B.8m
C.10m
D.12m
Many people worry that air pollution might changes in the weather around the world.
A.add to
B.lead to
C.turn to
D.belong to