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
答案:A
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
答案:A
A. 0.5
B. -1
C. -0.5
D. 1
A. 关于原点对称
B. 关于x=1对称
C. 关于y轴对称
D. 关于x轴对称
A. it
B. one
C. that
D. them
A. hers
B. she
C. her
D. herself
A. 0
B. 1
C. -1
D. 不存在
A. many cheaper and quicker
B. very cheaper and quicker
C. more cheaper and quicker
D. much cheaper and quicker
A. good
B. better
C. best
D. the best
A. looks
B. smells
C. sounds
D. tastes
A. always
B. seldom
C. often
D. usually
A. watches
B. watched
C. was watching
D. had watched