下列哪种体位最易导致严重肥胖病人猝死()
A．侧卧
B．坐位
C．俯卧
D．仰位
E．直立
参考答案：D
In foreign trade business, the trade terms CFR is often used,CFR is the abbreviation for ________.
A．cost,insurance and freight
B．commercial invoice
C．cost and freight
D．consular invoice
设备运转中轴承压盖处漏油的主要原因及预防措施有哪些？
