Which TWO materials can be used as a substratum? A．oxygen-rich solution B．coconut fibre C．mineral wool D．rock

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问题 Which TWO materials can be used as a substratum?
A．oxygen-rich solution
B．coconut fibre
C．mineral wool
D．rock
E．paper fibre

选项

答案(outright) failure

解析

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Which TWO materials can be used as a substratum? A．oxygen-rich solution B．coconut fibre C．mineral wool D．rock

雅思听力

雅思（IELTS）

The(i)ofthescientist’srebuttalofthehypothesiswasstartlingeveninthenotoriously(ii)worldofnineteenth-c

Manyeconomistsbelievethatsinceresourcesarescarceandsincehumandesirescannotallbe(i),amethodof(ii)i

ItishersupremelyskillfuluseofsophisticatedlaboratoryinstrumentsthatmakeVeronicathe______researchtechnicianthatsh

Manyresearchersattributethelargenumberofphysiologicalandbehavioralsimilaritiesbetweenbirdsandmammals,whichhaves

Thoughthevolumeofradioactivewasteproducedbynuclearpowerplantsis______,theproblemofhowtodisposeofthatwasteis

Manywelfarereformerswouldsubstituteasingle,federallyfinancedincomesupportsystemfortheexisting____ofoverlapping

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PART1Theexaminerwillaskyouquestionsaboutyourself,suchas:—What’syourname?—Whatnationalityareyou?—Whatpart

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二氧化碳结合力(C02CP)降低不常见于（　　）。