MP3、MP4、数码相机等用电池时,提倡()。
A.用一次性电池,到处都可买到,很方便
B.使用可充电电池,有外接电源时则用外接电源
C.新电池和旧电池混着用比较节约
参考答案:B
The physician orders supplemental oxygen for a client with a respiratory problem. To provide the highest possible oxygen concentration, the nurse expects to use which oxygen delivery device
A. Nasal cannula. B. Venturi mask. C. Partial rebreathing mask. D. Nonrebreathing mask.
下列哪项不属于网络公关的特点()
A.互动性强
B.效果不易评估
C.形式多样
D.能够影响终端消费者