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有关挤压伤,下列哪项是错误的()
选择培养基是
In a survey of 63 people, 23 people subscribed to magazine A, 21 people subscribed to magazine B, and 17 subscribed to magazine C. For any two of the magazines, 4 people subscribed to both magazines but not to the third magazine. If 18 people in the survey did not subscribe to any of the three magazines, how many people subscribed to all three magazines?
标的资产均为1股A股票的两种欧式期权的执行价格均为30元,6个月到期,股票的现行市价为35元,看跌期权的价格为3元。如果6个月的无风险利率为4%,则看涨期权的价格为( )。
抽样具有科学性的理由是()。
设计烈度为()及以上地区桥墩,应采用混凝土加护面钢筋。
转向架清洁前请确认()已经拆除。
班轮运输一般具有( )。
下列风险中不属于系统性风险的是()。
哪些类型的家长比较难沟通?教师如何应对?
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