单项选择题

论文选题之前建议百度搜索找一个合适的选题。

A．对
B．错

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女，40岁，因三个月前左上后牙龈发现小包，曾肿痛3次，流出部分脓液。要求诊治，最能明确诊断的一项检查是（）

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Whichof the following is NOT a motivation identified by the authors as afunction of the foreign exchange market? ( )
A、Thetransfer of purchasing power between countries.
B、Obtainingor providing credit for international trade transactions.
C、Minimizingthe risks of exchange rate changes.
D、Allof the above were identified as functions of the foreign exchangemarket.