A、 {x|-3<x<3}
B、 {x|x>3或x<-3}
C、 {x|-3≤x<3}
D、 {x|x≥3或x<-3}
答案:B
A、 {x|-3<x<3}
B、 {x|x>3或x<-3}
C、 {x|-3≤x<3}
D、 {x|x≥3或x<-3}
答案:B
A. open
B. close
C. opened
D. closed
A. serious
B. more serious
C. most serious
D. the most serious
A. heavy
B. hardly
C. heavily
D. strongly
A. f(-4)<f(-2)<f(-1)
B. f(-2)<f(-1)<f(-4)
C. f(-2)<f(-4)<f(-1)
D. f(-1)<f(-2)<f(-4)
A. 14
B. 21
C. 28
D. 35
A. so
B. and
C. or
D. but
A. good
B. better
C. best
D. the best
A. is directed
B. was directed
C. directed
D. directs
A. waited for
B. handed in
C. agreed with
D. knocked at
A. without
B. against
C. through
D. /