人体的B细胞Ig基因库有
A、2个
B、3个
C、4个
D、5个
E、6个
参考答案:B
(c) (i) State, giving reasons, whether dividend withholding tax (DWT) will be deductible from the dividends paid to the four shareholders of Green Homes Ltd and (4 marks)(ii) State the due date for payment of any DWT deductible from the dividends paid on 31 July 2007. (1 mark)
关于照片斑点,下列说法错误的是()
A.斑点多可使影像模糊
B.卤化银可形成胶片斑点
C.可有屏结构斑点和量子斑点
D.X线量子越少,量子斑点越多
E.照片斑点可经定影消除