你可能感兴趣的试题
see can see have seen can be seen
the process of specialization and professionalization the hardship of amateurs in scientific study the change of policies in scientific publications the discrimination of professionals against amateurs
the process of specialization and professionalization the hardship of amateurs in scientific study the change of policies in scientific publications the discrimination of professionals against amateurs
Can it see Can see it Can be seen it Can it be seen
sociology and chemistry physics and psychology sociology and psychology physics and chemistry
sociology and chemistry physics and psychology sociology and psychology physics and chemistry
may see can see may have seen can’t have seen
can, see can, be seen could, be seen could, see
the development in communication the growth of professionalization the expansion of scientific knowledge the splitting up of academic societies
can be seen can see be seen can’t see
A. can’t see can’t have seen mustn’t have seen needn’t have seen
a material that can be seen through a translucent(半透明的) material a material that can not be seen through a lucent material
the development in communication the growth of professionalization the expansion of scientific knowledge the splitting up of academic societies
Can it see Can see it Can be seen it Can it be seen
can see will be seen are seen were seen
there is little distinction between specialization and professionalization amateurs can compete with professionals in some areas of science professionals tend to welcome amateurs into the scientific community amateurs have national academic societies but no local ones
can’t have seen must have seen might have seen may have seen
can see cannot see can be seen cannot be seen
湘公网安备 43130202000226号