一个电压源,空载时电压为10V,内阻为10,则功率匹配时,为了使负载功率最大,则负载功率为().
A.1W
B.2.5W
C.5W
D.10W
参考答案:C
If you are too stressed out and angry, maybe you have ______yang.[ ]
A. much too
B. many too
C. too much
D. too many
干烤法 ()
A.61.1~62.8℃20分钟
B.71.7℃15~30秒
C.103.4kg/cm15~30分钟
D.121.3℃15~20分钟
E.160~170℃2小时