标准化成就测验的优越性体现在（）。
A.公正性
B.客观性
C.计划性
D.可比性
参考答案：B, C, D
在40克水中加入10克的盐，这时盐水的含盐率是20%______．
Do you know over there?
A．what happening
B．what was happened
C．what is happening
D．what did happen
