关于土地荒漠化的叙述，正确的是（   ）

Dear Betty,

    I'm your eraser Jill. This afternoon you lost me in your classroom. Simon found me and gave me to your English teacher Ms. Green. Now Ms. Green's three keys and I are in Ms. Green's bag. The bag is yellow. It's on Ms. Green's desk. Please call Ms. Green at 718-0167 and ask her for me. You can come to the library, too. Ms. Green is in the library now.

Jill

完形填空

Date: 19: 30, March 2.

Number: 16, Row 9, 1st F.

Price: $80

★Children below 1. 2m are not allowed    1    the theatre. Children above   1. 2m should enter    2   tickets only.

★Please check the date and seat number when you buy your ticket. Once the ticket has    3   , there is no refund.

★No   4   in the theatre. Dangerous things are not allowed in the theatre.

★The use of cameras, videos and tape recorders is not allowed in the theatre.  5    a security check is necessary.

★Please   6    your mobile phones or set them    7 the vibration mode.

★Please check your seat number and be seated before the performance   8  . If you arrive   9   the show begins, please wait outside the performance hall, and enter    10   into the hall during the interval.

已知k、b是一元二次方程（2x+1）（3x﹣1）=0的两个根，且k＞b，则函数y=kx+b的图象不经过（　　）