8
90 100
(10 3,30 )
1. a>b, ( )
A.ac>bc B.- ??
2>- ??
2
C.-a<-b D.a-2<b-2
2. 33, 24, t( ) ( )
A.t>33 B.t 24 C.24<t<33 D.24t33
3. a,b ,ax+b>0 x<1
3,bx-a<0 ( )
A.x>-3 B.x<-3 C.x>3 D.x<3
4. {- 2??< 6,
??-2 0 ( )
5. 2-3x2x-8 ( )
A.1 B.2 C.3 D.4
6. {??2,
??+ 2 > 1 ( )
A.-1 B.0 C.1 D.2
7. x-1 23x-7<8 x ( )
A.3,4 B.4,5 C.3,4,5 D.
8. 18~20 , 100 ,
0.55 , ( 0) 22,
. x ,
( )
A.1822-0. 55
100 x20 B.1822- ??
100 20
C.1822-0.55x 20 D.1822- ??
0. 55 20
9. x {??-??> 0,
1-2??> ??- 2 ,a ( )
A.a1 B.a>1 C.a-1 D.a<-1
10. 0 , 10 , , 2
mm/h , 0.2 mm/h ,
, 18 mm, ( )
A.7 h B.8 h C.9 h D.10 h
(10 3,30 )
11. a<0,6+a___________6-a( < >).
12. x (1+a)x<3 x> 3
1+??,a ___________.
