证券投资风险
参考答案:是指投资者在证券投资过程中遭受损失或达不到预期收益的可能性。它可以分为两类,即经济风险和心理风险。证券投资所要考虑的风险主要是经济风险。
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.Only under special circumstances________to miss the final examination.
A are students allowed B allowed are students
C students are allowed D are allowed students
在甲烷、乙醇、碳酸、醋酸四种物质中,不属于有机物的是______.