A:铁和稀硫酸反应 2Fe+6H+==2Fe3++3H2↑
B:硝酸和烧碱溶液反应 H++OH-==H2O
C:氢氧化钡溶液与硫酸溶液反应 Ba2++SO42-==BaSO4↓
D:碳酸钙溶于稀盐酸 CO32-+2H+==H2O+CO2↑
I like sports very much. I have 5 ____ (篮球) and 4 baseballs. Do you ____ (知道) where they are. They’re under my bed on the ____ (地板). I have a ____ (兄弟).____ (他)name is Peter, he likes volleyballs. He has a ____ (大的) volleyball collection. He thinks it is ____ (有趣的). He plays it ____ (每个) day at ____ (学校) with his ____ (朋友们).
依据课文填空
子路日:“愿闻子之志。”子日:“老者安之,____,____。”
下面是中华慈善总会的图标,请写出该图标中除文字以外的构图要素及其寓意,要求语意简明,句子通顺,不超过80个字。
有一根直导线上通以恒定电流I,方向垂直指向纸内,且和匀强磁场B垂直,则在图中圆周上,磁感应强度数值最大的点是( )
分布在南北纬40°~60°大陆西岸的气候类型是( )