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《中学数学月刊》1999年第9期第36页《直线的条数问题例析》一文中，已知异面直线a，b所成的角为T，P为空间一定点，则过P且与a，b成角为a，卢的直线条数的一般结论表是错误的．例如取γ=50°，β=85°，α=30°，满足表中条件y＜α＋β＜180°－γ，按表中结论，过P且与a，b成
In the article “Example analysis of the number of straight lines” in Middle School Mathematical Monthly, No. 9, 1999, p. 36, it is known that the angles formed by the different straight lines a, b are T, P is a certain point in space, and then P The angle between a and b is a, and the general conclusion of Lu’s straight line is wrong. For example, take γ=50°, β=85°, α=30°, satisfy the condition y<α+β<180°-γ in the table, and according to the conclusion in the table, over P and with a, b