显示器的分辨率高低表示()。 ["A.在同一字符面积下,所需像素点越多,其分辨率越低","B.在同一字符面积下,所需像素点越多,其显示的字符越不清楚","C.在同一字符面积下,所需像素点越多,其分辨率越高","D.在同一字符面积下,所需像素点越少,其字符的分辨效果越好"]
在制冷系统中,向周围放热的设备是() ["蒸发器","冷凝器","毛细管","压缩机"]
男性,50岁,低热咳嗽2个月伴右胸痛,今日咯血80ml。体温38℃,呼吸18次/分。患者经治疗无好转,仍发热、咯亦,每天咯血约150ml,胸片提示右肺上叶渗出病灶,锁骨下区有透亮区。血压120/80mmHg,血WBC15.0×109/L,N86%,ESR90mm/h,痰涂片找到抗酸杆菌。应采取哪些措施() ["A.患侧卧位","正规抗结核治疗","糖皮质激素","垂体后叶素静滴","输血","痰液做灭菌处理"]
模拟式电压表中应用较为普遍的交流—直流变换器是()。 ["检波器","分压器","变压器","放大器"]
在完全相同的条件下,R22的制冷能力() ["大于","小于","等于"]
藤本植物