要使分式有意义,
则x-1≠0,
解得x≠1.
故选A.
If it is quite _______ to you, I will visit you next Tuesday.
A.convenient
B.fair
C.easy
D.comfortable
Which of the following market structure characterized that a large number of competitors produce (slightly) differentiated products with low barriers to entry()
A. Perfect competition.
B. Monopolistic competition.
C. Oligopoly.