What is the position of the head of human-resource management in an American firm?
A.He is one of the most important executives in the firm.
B.His post is likely to disappear when new technologies are introduced.
C.He is directly under the chief financial executive.
D.He has no say in making important decisions in the firm.
第8题
水中OH-构成氢氧根碱度,CO32-构成碳酸盐碱度,HCO3-构成碳酸氢盐碱度。但是,这三种碱度在水中不能同时存在,因为()能与()反应(写出反应的离子式):(),故水中不能同时含有()和()。
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