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【单选题】
If a drought destroyed half of the U.S. garlic crop at a time when the health benefits of garlic were being well-publicized, economists would expect that in the market for garlic ( )A.
quantity exchanged would rise but the change in price is uncertain without further information.
B.
price would rise but the change in quantity exchanged is uncertain without further information.
C.
both price and quantity exchanged would rise.
D.
price would rise and quantity exchanged would fall
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【简答题】先导式溢流阀有一个 ▁▁▁▁▁ 控制口,可实现远程 ▁▁▁▁▁ 或 ▁▁▁▁▁ (与油箱相通)。
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