题干
— We did not see him at the lecture yesterday．
— You ______ him, since I went to an international conference with him．
— You ______ him, since I went to an international conference with him．
A：mustn’t have see
B：can’t have see
C：couldn’t see
D：needn’t have see
答案(点此获取答案解析）
B
是长方体
被平面
截去几何体
后
为线段
上异于
的点，
为线段
上异于
，则下列结论中不正确的是 （ ）
