[单项选择]某化工项目，设计的年产量为10万吨，预计单位产品售价为500元／吨（已扣除销售税金及附加、增值税），正常生产年份单位产品变动成本为300元／吨，年产量盈亏平衡点为5万吨。若单位产品变动成本上升为340元／吨，其他数值保持不变，则产量盈亏平衡点的生产能力利用率为（ ）。 A. 29.41％ B. 33.33％ C. 50.00％ D. 62.50％
第17题:[单项选择]<br><br><br/>A.never<br/>B.seldom<br/>C.always<br/>D.scarcely<br/>参考答案:C 答案解析:[解析] 根据he were as easy to please as her mother，可以断定该空格填always。
第26题: [单项选择]The Olympic Games, ______ in 776 B.C., did not include women players until 1912. A. first playing B. to be first played C. first played D. to be first playing 参考答案:C 答案解析:[解析] 主语和非谓语动词之间是被动关系，因此应该用过去分词，它相当于一个非限制性定语从句“which were first played”。例如：Crinkled with age，the old
