问题
选择题
Betty and Tony go to the same school, but they are in different ________.
[ ]
A. class
B. grade
C. grades
D. group
答案
答案：C
搜题请搜索小程序“爱下问搜题”
Betty and Tony go to the same school, but they are in different ________.
[ ]
A. class
B. grade
C. grades
D. group
答案：C
，EF与面AC的距离为2，则该多面体的体积是（）。
