—He's friendly and helpful.
A:What's he like?
B:How's he?
C:What's he?
D:What does he like?
下列关于声音的说法,正确的是( )
教室里贴有四幅图幅大小相同的地图,按比例尺由大到小排列正确的是( )
①世界地图 ②中国地图 ③浙江地图 ④杭州地图
根尖吸收水分和无机盐的最主要部位是( )