A.             B.               C.ac＞bc                 D.ac＜bc

(1)若x－3＞2，则_________；

(2)若a＜b，1＜c＜10，则algc_______blgc.

A.－π≤α－β ≤0                                                     B.－π＜α－β ≤0

C.－π＜α－β ＜π                                                     D.－π≤α－β ≤π

①a＜c  ②c＜a  ③a＞b＞0＜

A.0                                   B.1                                  C.2                            D.3

                        B.(1＋a)^a＞(1＋b)^b                                         

                        D.(1－a)^a＞(1－b)^b

A.ad＞bc             B.ac＞bd                    C.a－c＞b－d               D.a－d＞b－c

A.2a＋8c＞2b＋8d   

B.2a+8d＞2b+8c

C.2a－8c＞2b－8d

D.2a+2c＞8b+8d