A:I did discover
B:did I discover
C:I discovered
D:discovered
自然环境中的物质处于不断的循环运动中,图中序号代表碳循环的过程。读图,回答下列各题。
植物果实的各部分是由花的相应部分发育而来,其中匹配错误的是( )
Dogs have a very good ______ of smell and are often used to search for survivors in the earthquake.
解释下列词语诗句
①茅檐低小,溪上青青草。
②醉里吴音相媚好,白发谁家翁媪?