作为一种国务公务员交流制度，国家公务员在挂职锻炼期间，不改变与原机关的人事行政关系。
参考答案：对
肋间神经痛不受呼吸、咳嗽、喷嚏及躯体活动的影响
In the foreign trade business, the trade terms CFR is often used. CFR is the abbreviation for （）.
A. Commercial Invoice
B. Cost, insurance and freight
C. Cost and freight
D. Carriage paid to
