关于康普顿效应的发生几率错误的是()
A.与物质的原子序数成正比
B.与入射光子的能量成反比
C.与入射光子的波长成正比
D.与入射光子的频率成反比
E.与管电流成正比
参考答案:E
He took pity on the people in the flooded areas and________his clothes and quilts to them. [ ]
A. gave away
B. gave off
C. sent out
D. threw away
翡翠颜色对其估价影响很大,下列颜色的翡翠中,( )颜色的价格最高。
A.翠绿
B.皇冠绿
C.白地青
D.瓜皮绿