我会连。
匀称 珊瑚 甩掉 撅嘴 挣脱 扯开 精彩
平舌音 翘舌音
平舌音：撅嘴 精彩
翘舌音：匀称 珊瑚 甩掉 挣脱 扯开
There _____ much snow in my hometown. It's warm in winter.[ ]
A. isn't
B. aren't
C. is
D. are
病毒性疾病的标本采集要求？（）
A.尽早采集发病初期的标本
B.适宜部位采取
C.标本应尽快冷冻
