大学生心理健康教育应该以预防为主，（）
参考答案：对
--- I rang you at about ten, but there was no reply.
--- Oh, that was probably ____ I was seeing the doctor.
A．when
B．why
C．what
D．that
按照《中华人民共和国物权法》的规定，工业用地必须以招标、拍卖或挂牌方式出让。（ ）
