下面程序段计算学生的外语附加分：外语6级（lang6）为 ”优秀” 加15分，”通过” 加10分；外语4级（l...
单项选择题下面程序段计算学生的外语附加分：外语6级（lang6）为 ”优秀” 加15分，”通过” 加10分；外语4级（lang4）为 ”优秀” 加8分，”通过” 加4分，外语附加分只能计一次最高的分数。下面 能正确计算。
A、If lang6 = "优秀" Then langf = 15 ElseIf lang6 = "合格" Then langf = 10 ElseIf lang4 = "优秀" Then langf = 8 ElseIf lang4 = "合格" Then langf = 4 Else langf = 0 EndIf
B、If lang4 = "合格" Then langf = 4 ElseIf lang4 = "优秀" Then langf = 8 ElseIf lang6 = "合格" Then langf = 10 ElseIf lang6 = "优秀" Then langf = 15 Else langf = 0 EndIf
C、If lang6 = "优秀" Then langf = 15 If lang6 = "合格" Then langf = 10 If lang4 = "优秀" Then langf = 8 If lang4 = "合格" Then langf = 4 langf = 0
D、If lang4 = "合格" Then langf = 4 If lang4 = "优秀" Then langf = 8 If lang6 = "合格" Then langf = 10 If lang6 = "优秀" Then langf = 15 Else langf = 0
E、If lang6 = "优秀" Then langf = 15 If lang6 = "合格" Then langf = 10 If lang4 = "优秀" Then langf = 8 If lang4 = "合格" Then langf = 4 Else langf = 0
