盐酸异丙嗪的含量测定采用
A．维生素BlB．HClO4滴定液C．GC法D．去氧肾上腺素E．永停终点法
参考答案：B
The problem of global warming is serious. _____ , the sea levels have _____a little. [ ]
A. As a consequence; risen
B. On the contrary; arisen
C. On the other hand; arisen
D. In other words; risen
以下可用来描述计量资料的离散程度的指标是
A、算术均数
B、几何均数
C、中位数
D、标准差
E、四分位数
