[问答题]-------------.
[多选题]A.分闸速度B.合闸速度C.平均速度
[多选题]A.分闸速度B.合闸速度C.平均速度
[单选题]A.0B.1C.-1D.λ
[单选题]A.0B.1C.-1D.λ
[单选题]A.R(m-1)(n+1)(x)B.R(n+1)(m-1)(x)C.R(x)(n+1)(m-1)D.R(m-1)(x)
[单选题]ρ=x2y,则该薄片的质量为( ).A.1/35B.1/5C.1/7D.1/48
[单选题]ρ=x2y,则该薄片的质量为( ).A.1/35B.1/5C.1/7D.1/48
[单选题]ρ=x2y,则该薄片的质量为( ).A.1/35B.1/5C.1/7D.1/48