【单选题】Jim wanted to have his bedroom ______ and is looking for someone who can do the job.
【判断题】结论,是基于总结归纳而逐步归纳出来的,是作者希望你相信的一个或一系列陈述。( )
【判断题】裸蕨纲是目前所知最古老最原始的陆生高等植物。
【判断题】裸蕨纲是目前所知最古老最原始的陆生高等植物。
【单选题】Jim failed twice, but he wanted to have ____ ______ try.
【简答题】What did Jim want to have? He wanted to have a ______ .
【单选题】逻辑推理是化学学习常用的思维方法.下列观点正确的是( )
A.
金属元素在化合物中只显正价,所以非金属在化合物中只显负价
B.
酸的溶液pH值小于7,碱的溶液pH大于7,所以盐的溶液pH值等于7
C.
氧化物只含有两种元素,所以氧化物中一定有一种元素不是氧元素
D.
酸碱中和反应生成盐和水,所以生成盐和水的反应一定是中和反应
【单选题】Jim has made up his mind not to go to the meeting.