【简答题】(15分)有机物A是由C、H、O三种元素组成的五元环状化合物,其相对分子质量为98,其核磁共振氢谱只有1个峰;F的核磁共振氢谱有3个峰,峰面积之比为2:2:3。G是一种合成橡胶和树脂的重要原料。已知: ① ② RCOOH RCH 2 OH(其中R是烃基) 有关物质的转化关系如下图所示,请回答以下问题: (1)A中不...
【简答题】用单臂电桥测电阻时,如果出现了下述情况,试选择出仍能正常进行测量的情况,它们是:( ) (6.0分)A. 电源正负极接线反了; B. 有一个桥臂阻值恒为 “0”; C. 有一个桥臂电阻恒为 “无穷大”; D. 检流计支路不通(断线); E. 电源与检流计之接线位置互换;
【单选题】What is the International Labor Organization’s report mainly about?
A.
Government’s role in resolving an economic cr.
B.
The worsening real wage situation around the world.
C.
Indications of economic recovery in the United States.
D.
The impact of the current economic cr on people’s life.
【简答题】G是一种合成橡胶和树脂的重要原料,A是C、H、O三种元素组成的五元环状化合物,相对分子质量为98,其核磁共振氢谱只有一个峰;F的核磁共振氢谱有3个峰,峰面积之比为2:2:3. 已知: (其中R是烃基) 有关物质的转化关系如右图所示,请回答以下问题: (1)A中不含氧的官能团的名称是______;⑤的反应类型是______.G的结构简式为______;G与Br 2 的CCl 4 溶液反应,产物有__...
【单选题】在托盘服务中,重托与轻托的分界线为( )
【单选题】What did Labor Minister July Moyo say?
A.
The movement' s general council was determined that the strike should go ahead.
B.
With immediate effect, the labor movement has now put the issue of national protest on its agenda.
C.
The union should not have informed the government first.
D.
The strike is illegal.
【判断题】移动自组网可以不依赖于预设的基础设施临时组建
【单选题】谷歌掌门人施米特宣称“互联网即将消失”。其实,施米特指的是互联网即将被改造成“物联网”,即从以人与人之间的文本图像交流为主被改造成以物与物之间的连接为主,使人在相互联系的同时能够监控操纵各种人造物和机器设备。这样,在“大数据”的背景下,人们就会沉浸在与我们现在所处的物理世界在经验上难以分辨的虚拟世界。 从这段文字,可以看出作者的态度是( )。
C.
物联网通信技术更具有公众的共性化和资源的共享性
D.
物联网技术与虚拟世界的融合,将改变多数人的生活方式
【简答题】What does Lisa Lynch think about the Labor Department's report? [A] It should be revised. [B] It is too long. [C] It covers a broad area. [D] It is positive.