混悬型气雾剂的组成部分不包括：
A．抛射剂B．潜溶剂C．分散剂D．助悬剂E．润湿剂
参考答案：B
__________ manager of the department, Mr Wang didn't feel happy as he was put under great pressure.
A．Appointed
B．To appoint
C．Appointing
D．Having appointed
下列各组离子因发生氧化还原反应而不能大量共存的是
