166. I think your bookshelf is too high. I can’t reach a book on top even when I _____ my hand. A. hold back B. hold on C. hold out D. hold up 答案:C有一段演绎推理是这样的:“直线平行于平面,则平行于平面内所有直线;已知直线
,直线平面,直线∥平面,则直线∥直线”的结论显然是错误的,这是因为
A.大前提错误
B.小前提错误
C.推理形式错误
D.非以上错误