【判断题】The production set of a firm is the set of all products the firm can produce.
【判断题】Langue is the set of conventions and rules which language users all have to abide by, and parole is the concrete use of the conventions and the application of the rules.
【判断题】The production set of a firm is the set of all products the firm can produce.
【单选题】2003年全国男性人口数为665566万人;2002年全国金融、保险业增加值为5948.90亿元;2003年全社会固定资产投资总额为55566.61亿元;2003年全国城乡居民人民币储蓄存款余额103617.7亿元。以上总量指标依次为( )。
【单选题】现阶段我国的剥削阶级作为阶级已经被消灭,但是阶级斗争还将( )。
【判断题】Langue is the set of conventions and rules which language users all have to abide by, and parole is the concrete use of the conventions and the application of the rules.
【判断题】开关稳压电源的调整管是工作在开关状态,利用控制调整管导通与截止时间的比例来稳定输出电压。它的控制方式有脉宽调整型( PWM )、脉频调制型( PFM )及混合调制型, 开关稳压电源的效率高。