设f(0)=0,则f(x)在x=0处可导の充要条件为()
A、
B、
C、
D、
Wooddoesnotconductelectricity;________.
A、sodoesn’trubber
B、alsodoesn’trubber
C、nordoesrubber
D、norrubberdoes
A、合同,且相似
B、合同,但不相似
C、不合同,但相似
D、既不合同,又不相似
WhenIcamethroughthecustomsattheairport,Ihadtopay________onaclockIhadbought.
A、taxes
B、duty
C、fines
D、fees
Iwishyou________likethat.
A、don’ttalk
B、won’ttalk
C、wouldn’ttalk
D、nottotalk