【单选题】按照《旅行社条例》规定,某经营国内旅游和出入境旅游的旅行社,总共缴纳的质量保证金数额是()。
【单选题】下列培养基中可以用于药品中质控菌——大肠杆菌检查的是:
【单选题】某企业在确定产品产量指标时采取盈亏平衡分析法,盈亏平衡示意图见下图。该企业2012年计划生产一种产品,该产品单价为500元,单位产品的变动成本为250元,总固定成本为600万元。 根据以上资料,回答下列20~24题:在盈亏平衡图上标号为4的线是( )。
【单选题】While people around the world are talking about the prevention and treatment of AIDS, let's not【C1】______that we have had an old enemy, cancer, which【C2】______sounds horrible, but also,【C3】______to ma...
【单选题】在C语言中,执行语句:for (j=1; j++<4; );后,变量j的值是( )。
【判断题】角色游戏、结构游戏、规则游戏都属于创造性游戏。
【简答题】完形填空。 The computer is fast and never makes a mistake, while people are slow and often 1 mistakes. That's what people often say when they 2 computers. For over a quarter of a century, engineers have b...