单位换算
(1)688Ω= _________ KΩ
(2)220V=_________mV.
(1)0.688;
(2)2.2 ×105
下列成语故事反映春秋战国历史的有
①退避三舍 ②卧薪尝胆 ③围魏救赵 ④破釜沉舟[ ]
A、①②
B、①②③
C、②③④
D、③④
—Yueyang Sports Center will be built this year .
— news it is .
A. How exciting B. What an exciting C. What exciting