请指出下列哪些技术特征可达到移动台节电的目的?()
A.功率控制
B.切换
C.不连续发射
D.跳频
参考答案:A, C
脑膜炎病人头痛的特点为
A.伴有发热、呕吐 B.伴有昏迷瘫痪 C.伴有视力障碍D.间歇性头痛 E.跳动性头痛
—May I drink __________ water?
—Sorry, I don't have _________.[ ]
A. some; some
B. some; any
C. any; some
D. any; any