【单选题】下列对于“摩尔”的理解正确的是 [ ]
C.
摩尔可以把物质的宏观数量与微观粒子的数量联系起来
D.
国际上规定,0. 012 kg C中所含有的碳原子数目为1摩
【单选题】关于摩尔质量与相对原子质量、相对分子质量的关系下列叙述正确的是( )。
C.
摩尔质量在数值上等于物质的相对原子质量或相对分子质量,其单位是g/mol
D.
摩尔质量等于相对原子质量或相对分子质量,其单位是g
【判断题】黄金是一种金融投资产品,更是一种重要的金融避险工具。黄金具有投资、收藏、馈赠的作用,同时具有较强的变现能力.
【单选题】Why did he decide not to go to the seaside for holiday?
A.
He has been to the seaside many times.
B.
He would have to take a car there.
C.
It would not give him exercise.
D.
He dislikes lying in the sun.
【单选题】He _____ the lion, fired but missed it.
【单选题】---- Tom is _________ to computer games. ---- No wonder he is not doing well in school recently.A
A.
9. ---- Tom is _________ to computer games. ---- No wonder he is not doing well in school recently. A.interested