单项选择题

It can not be denied that the existing resources on earth will be depleted, but scientists areto concede the inevitability of that day,that new energies can be found in the near future.（）

A、bound… assuming
B、unprepared … skeptical
C、hesitant… convinced
D、 likely… realizing
E、eager … hypothesizing

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热门试题

单项选择题

The primary purpose of the passage is to（）

A、describe in detail how the principles of homeostasis apply to living things
B、propose a modification in the most widely accepted theory of homeostasis
C、compare and contrast the role of positive and negative feedback in maintaining various applied systems
D、discuss the concept of homeostasis in the abstract and relate some of its most important principles
E、provide examples of systems which are ruled by the principle of homeostasis

单项选择题

The vireo’s comeback may prove that habitat along streams in Southern California is recovering from the effects of pollution, ______indicator of environmental health in a state that has lost most of its______woodlands.（）

A、a leading … superfluous
B、an apocryphal … ecological
C、a partial … surfeit
D、a telling … riparian
E、an anecdotal … arboreal

It can not be denied that the existing resources on earth will be depleted, but scientists are______to concede the inevitability of that day,______that new energies can be found in the near future.（）

It can not be denied that the existing resources on earth will be depleted, but scientists areto concede the inevitability of that day,that new energies can be found in the near future.（）