我国最大的咸水湖和最大的淡水湖分别是[ ]
A．洞庭湖和鄱阳湖
B．鄱阳湖和洞庭湖
C．鄱阳湖和青海湖
D．青海湖和鄱阳湖
答案：D
The newcomer went to the library the other day and searched for ________ he could find about Mark Twain.
A．wherever
B．whatever
C．however
D．whichever
诊断术后肺不张较有意义的体征是
A．术后早期发热，呼吸及心率增快B．白细胞及中性粒细胞增高C．胸部叩诊呈浊音或实音D．听诊有局限性湿性啰音E．呼吸音减弱、消失或为管性呼吸音
