[判断题]煤的收到基水分Mar越大,则该煤低位发热量越低
[多选题]产品的制造成本包括 A.直接材料B.管理费用C.直接工资D.其他直接支出
[问答题]命中率法是当测验用来做取舍的依据时,用其正确决定的比例作为效度指标的一种方法.命中的情况是指
[多选题]学习记忆比较长的材料,中间部分的内容记忆的效果差,是由于受到( )干扰学习记忆比较长的材料,中间部分的内容记忆的效果差,是由于受到( )干扰A.前摄抑制B.倒摄抑制C.内抑制D.外抑制
[单选题]公司网络中有一台AR2200无法正常启动,管理员希望更新它的VRP,则该如何实现A、管理员需要使用console线连接路由器和主机,然后进入BootROM界面就可以完成升级B、管理员需要把AR2200配置为FTP客户端,使用FTP来传输新的VRPC、管理员需要配置AR2200启动时通过DHCP获得IP地址,然后通过TFTP来获取VRP系统文件D、管理员需要在本地主机上使用Telnet来实现远程更新设备的VRP系统文件
[多选题]平屋顶排水坡度的形成分为( ). A搁置找坡 B 结构找坡 C构造找坡 D垫置找坡
[单选题]以太网交换机中的端口/MAC地址映射表( ).A、是由交换机的生产厂商建立的B、是交换机在数据转发过程中通过学习动态建立的C、是由网络管理员建立的D、是由网络用户利用特殊命令建立的
[问答题]In the United States, it is not customary to telephone someone very early in the morn-.ing. If you telephone him early in the day, while he is shaving or having breakfast, the time of the call shows that the matter is very important and requires immediate attention. The same meaning is attached to telephone calls made after 11:00 p. m. If someone receives a call during sleeping hours, he assumes it.s a matter of life or death. The time chosen for the call communicates its importance. In social life, time plays a very important part. In the U.S.A. guests tend to feel they are not highly regarded if the invitation to a dinner party is extended only three or four days before the party date. But it is not true in all countries. In other areas of the world, it may be considered foolish to make an appointment too far in advance because plans which are made for a date more than a week away tend to be forgotten. The meaning of time differs in different parts of the world. Thus, misunderstandings arise between people from different cultures that treat time differently. Promptness is valued high->ly in American life, for example. If people are not prompt, they may be regarded as impolite or not fully responsible. In the U.S. no one would think of keeping a business associate waiting for an hour, it would be too impolite. A person who is 5 minutes late, will say a few words of explanation, though perhaps he will not complete the sentence.
[判断题]过热器的作用是:将饱和蒸汽加热成具有一定温度的过热蒸汽
[名词解释]述高速公路的特点
[多选题]She was about to lock the door when it _ to her that she had left the burner on in the kitchen.A.appealed B. happened C.occurred D.struck
[问答题]简述熵增原理,并写出表达式.
[多选题]影响企业支付低股利的主要因素有( ).A、偏爱近期股利 B、股利收益的有效税率高于资本收益的有效税率C、考虑到企业在发放股票筹集时所发生的筹资费用D、对股利支付的限制
[单选题]下列那种机器人不是军用机器人.( )A “红隼”无人机B 美国的“大狗”机器人C 索尼公司的AIBO机器狗D “土拨鼠”
[判断题]每一次抽样的实际误差虽然不可知,但却是唯一的,因而抽样误差不是随机变量.( )
[填空题]维生素E的乙醇液与硝酸共热显
[判断题]在保证概率度和总体方差一定的条件下允许误差大小与抽样数目多少成正比.
[单选题]血液中的单核细胞进入结缔组织后成为( ). A、 成纤维细胞 B、 巨噬细胞 C、 浆细胞 D、 肥大细胞
[单选题]八输入端的编码器按二进制数编码时,输出端的个数是( ).A.2个 B.3个 C.4个 D.8个
[单选题]在高斯平面直角坐标系中,x轴方向为( )方向. A.东西 B.左右 C.南北 D.前后
[单选题]下列说法不正确的是( ).A. 在其他条件不变的情况下提高折现率会使得净现值变小B. 在利用动态指标对同一个投资项目进行评价和决策时,会得出完全相同的结论C. 在多个方案的组合排队决策中,如果资金总量受限,则应首先按照净现值的大小进行排队,然后选择使得净现值之和最大的组合D. 两个互斥方案的差额内部收益率大于基准收益率则原始投资额大的方案为较优方案