(本练习题适合人教版、苏教版新教材,满分150分,时间120分钟)　　一、选择题:(每小题3分,共36分,每题只有一个正确答案,请把各题的正确答案填在下表相应位置)1.x为何值时,式子13-x+x+2有意义(　　)A.x≥-2　　　　B.x≥-2且x≠3C.-2≤x3　　D.-2≤x≤32.若a=4-1+5,b=5+1,则下 (This exercise is suitable for the teaching and education editions of the Jiangsu Education Press, with a perfect score of 150 minutes and a time of 120 minutes.) 1. Multiple-choice questions: (3 points for each question, for a total of 36 points. Each question has only one correct answer. Please put each question. The correct answer is filled in the corresponding position in the table below.) When the value of 1.x is given, the expression 13-x+x+2 makes sense () Ax ≥ -2 Bx ≥ -2 and x ≠ 3C. - 2 ≤ x3 D. -2 ≤x≤32. If a=4-1+5, b=5+1, then