A、 how
B、 if
C、 that
D、 whether
答案:C
解析:解析:separate from 和……分开
A、 how
B、 if
C、 that
D、 whether
答案:C
解析:解析:separate from 和……分开
A. call
B. to call
C. calling
D. called
A. five dollars
B. five-dollars
C. five-dollar
D. fifth dollar
A. any
B. some
C. little
D. a piece
解析:解析:习语 Why don't you have some……
A. 单调增加且为凹
B. 单调增加且为凸
C. 单调减少且为凹
D. 单调减少且为凸
解析:解析:本题考查的知识点为利用一阶导数符号判定函数的单调性和利用二阶导数符号判定曲线的凹凸性.
A. to get
B. for to get
C. for get
D. for getting
A. could start
B. can start
C. had started
D. started
A. long
B. far
C. distant
D. near
解析:解析:how long 一段延续的时间解析:--How long have you studied English?解析:--I have studied English for 3 years (since 3 years ago).
A. for make
B. to make
C. to making
D. for making
解析:解析:be responsible for