A、 polite
B、 direct
C、 active
D、 lively
答案:C
A、 polite
B、 direct
C、 active
D、 lively
答案:C
A. {x|-3<x<3}
B. {x|x>3或x<-3}
C. {x|-3≤x<3}
D. {x|x≥3或x<-3}
A. clean
B. cleaned
C. have cleaned
D. am cleaning
A. damaged
B. were damaged
C. were damaging
D. are damaged
A. f:x→y=(1/2)x
B. f:x→y=(1/3)x
C. f:x→y=(1/4)x
D. f:x→y=(1/6)x
A. So am I
B. Neither am I
C. Neither I am
D. So I am
A. 24
B. 20
C. 16
D. 8
A. turn up
B. give up
C. stay up
D. grow up
A. 0
B. 1
C. -1
D. 不存在
A. natural
B. dangerous
C. soft
D. cool
A. 2x+1
B. 2x-3
C. 2x-5
D. 2x-7