【单选题】纤维素是由多个葡萄糖单元通过( )形成的线型聚合物,它是由C、H、O三种元素组成,其分子式为(C6H10O5)n,分子量为162n,纤维素不溶于水,无还原性,应用广泛。
【单选题】Why was he made a writer for the paper?
A.
The old editor retired.
B.
He wrote a good story.
C.
Another reporter quit.
D.
He was interested in financial news.
【单选题】The writer wrote the text because he had noticed that good table manners are ______.
A.
completely forgotten by young people
B.
brought back to people's attention
C.
used when making professional decisions
D.
difficult to learn and practise
【单选题】This job has nothing to do my major.
【单选题】下列关于纤维素的说法不正确的是
A.
纤维素的化学结构为β(1,4)-D-葡聚糖,结构组成单元为D-葡萄糖
【单选题】Tom Smith was a writer. He wrote detective stories for magazines. One evening he could not find an end for a story. He sat with his typewriter in front of him, but he had no ideas. So he decided to go...
【多选题】2011年7月,住建部发布了“关于发布行业标准《建筑与市政工程施工观场专业人员职业标准》的公告”(第1059号),公告指出:该标准自2012年1月1日起实施。《建筑与市政工程施工现场专业人员职业标准》中规定,劳务员的主要工作职责之一是:“负责或监督劳务人员进出场及用工管理。”作为劳务员,对本岗位的工作职责必须掌握。请依据《建筑与市政工程施工现场专业人员职业标准》回答以下问题。1.承包人因某种原因终...