A、 To;of
B、 At;at
C、 To;in
D、 In;about
答案:C
A、 To;of
B、 At;at
C、 To;in
D、 In;about
答案:C
A. going over
B. went over
C. go over
D. to go over
A. hers
B. she
C. her
D. herself
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. 3∈A
B. 1∈A
C. 0∈A
D. -1∉A
A. planted
B. plants
C. will plant
D. is planting
A. 0∈A
B. 3/4∈A
C. {0}包含于A
D. -π∈A
A. don't
B. didn't
C. wouldn't
D. won't
A. How often
B. How soon
C. How long
D. How far
A. can
B. must
C. may
D. need
A. π
B. 2π
C. 3π
D. 4π