CCTV歌手大赛,有一道辨听题:“先听音乐,后判断该音乐是哪-种乐器演奏的”,这主要考查歌手对乐器的鉴别能力,依据是 [ ]
A.音调
B.响度
C.音色
D.声速
答案:C
You can't complain of being left alone ________ you don't make any effort to meet people.[ ]
A. when
B. while
C. though
D. unless
RDW正常说明红细胞()
A.体积偏大
B.体积大小较为一致
C.结构正常
D.血红蛋白含量正常
E.染色正常