【单选题】-Do you often clean your ciassroom every day. ---Yes.,We do.
【单选题】关于资本市场线,下列表述中错误的是( )。
A.
R代表无风险资产的报酬申,它的标准差为零,即报酬率是确定的
B.
切点M代表惟一最有效的风险资产组合,它是市场均衡点,将其定义为“市场组合”
C.
直线的斜率代表期望报酬率,它等于无风险报酬率与风险报酬率之和
【单选题】--Do you often clean your dormitory? --Yes. Our dormitory ____ twice a day.
【单选题】关于零申报,下列表述正确的有()。
C.
增值税小规模纳税人当期收入为0,增值税可以零申报
【简答题】真空中两条平行的 “ 无限长 ” 均匀带电直线相距为 a ,其电荷线密度分别为+λ 和 - λ (1) 在两直线构成的平面上,两线间任一点的电场强度 ( 选 Ox 轴如图所示,两线的中点为原点 ) . (2) 两带电直线上单位长度之间的相互吸引力.
【判断题】库仑滴定不但能作常量分析,也能测微量组分。( )
【单选题】— Do you often clean your bedroom? — Yes. It _____ every day. [ ]
【单选题】- Do you often clean your classroom? - Yes, our classroom ______ every day.
【单选题】Do you often clean your classroom? —Yes. Our classroom ___ every day.