【判断题】兰贝特定律给出了黑体的辐射能按空间方向的分布规律,即黑体在各方向上的辐射能量与辐射角θ(辐射方向和平面法线n的夹角)余弦成正比。
【简答题】电动机铭牌上的温升是指电机在长期运行时所能允许的最大温度与()温度之差。
【简答题】A.By check. B.In cash. C.By credit card. D.By mail.
【单选题】听力原文:M: I want to cash this check for my mother, but the teller told me to bring it here. W: Yes, Sir. That's an out-of-town personal check. We wouldn't be able to cash it for you until the proceeds a...
A.
The bank will cash the check immediately.
B.
The bank will issue a new bank account and deposit the money for him.
C.
The bank will cash it for him until the proceeds are collected from the paying bank.
D.
The bank will endorse the check before payment.
【单选题】把单位时间内、单位可见辐射面积辐射出去的落在单位立体角内的辐射能量称为
【单选题】电动机铭牌上的温升,指的是()的允许温升。