【单选题】下列关于热辐射的说法不正确的是:( )
B.
一切绝对温度高于 0 K 的物质均能产生热辐射
【单选题】下列关于热辐射的说法正确的是:______。
【单选题】When there are not enough volunteers for the armed forces, the government ______ additional men.
【简答题】带负荷操作隔离开关可能造成弧光短路。()
【单选题】下列关于热辐射的说法,正确的是——
A.
热源温度愈高,与受辐射物体之间的距离越大,辐射越大
B.
热源温度愈高,与受辐射物体之间的距高越小,辐射越大
C.
热源温度愈低,与受辐射物体之间的距高越大,辐射越大
D.
热源温度愈低,与受辐射物体之间的距离越小,辐射越大
【单选题】某班进行打靶训练,已知小明的打靶命中率为0.6,则他第6次打靶恰好第3次命中的概率为:
【简答题】When does government become a 'consideration of convenience'?
【单选题】The government saves when:
A.
tax revenue is less than government spending.
B.
tax revenue is more than government spending.
C.
tax revenue equals government spending.
D.
tax revenue is positive.