问题
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In some modern large diesel engines, which of the following is used as the support for the main bearings?
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The most thrilling explanation is, unfortunately, a little defective. Some economi
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According to the passage, what can we learn about some highly open economies?A.They depend
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The author writes the passage toA.explain how currency devaluation affects economy.B.dispe
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In such a large class the teacher has some difficulty______specific help to all the studen
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If you live in a large city you are quite familiar with some of the problems of noise bu