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）

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Many(i)______ofthestyleofpaintingexemplifiedbyMarcelDuchamp’sworkfocusedonDuchamp’sNudeDescendingaStaircaseas

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Philosophicalproblemsarisewhenpeopleaskquestionsthat,thoughvery____,havecertaincharacteristicsincommon.

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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

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Manygrownpeoplenowbelievethat.Manyhousewivesgobacktoschoolinorderto.