一根长1米、横截面直径是20厘米的木头浮在水面上,小明发现它正好是一半露出水面,这根木头与水接触的面的面积是____平方厘米。
下图 是元素周期表中的一格,从中获取的信息不正确的是( )
Hi! I'm Nini. I'm a monkey. I like riding my bike. But I don't like skipping. Huanhuan is my brother. He likes basketball. I have(有)a good friend(朋友). Her name is Qiqi. She is a panda. She is fat. She likes table tennis.
根据短文内容选择正确的图片。
东南亚地区流经国家最多的河流是( )