山歌的音乐形态有四个特征()
A.声调高亢嘹亮
B.节奏自由
C.常用自由延长音来抒情
D.乐段结构较简单
E.表现方法比较细腻
参考答案:A, B, C, D
当x∈[-2,0]时,函数y=3x+1-2的值域是______.
What can we learn from the instruction tag (标签) in your clothes?[ ]
A. Don't wash the clothes in warm water.
B. Iron the clothes on high heat.
C. Dry-clean the clothes.