【单选题】The structures of diamond and graphite are shown. Which statement about diamond and graphite is not correct?
A.
Diamond is used in cutting tools because the strong covalent bonds make it very hard.
B.
Graphite acts a lubricant because of the weak bonds between the layers.
C.
Graphite conducts electricity because the electrons between the layers are free to move.
D.
Graphite has a low melting point because of the weak bonds between the layers.
【多选题】通常在()情况下需要对项目建议书和可行性研究报告进行评估。
E.
项目业主或投资者为了分析可行性研究报告的可靠性,进一步完善项目方案
【单选题】What is in great demand in factories?
【多选题】以下属于新时代中国特色社会主义基本方略的有()
【多选题】以下属于新时代中国特色社会主义基本方略的有( )
【多选题】下列关于项目建议书和可行性研究报告的表述中正确的有( )。
D.
可行性研究报告经批准后,是工程初步设计的依据