孟买型〞O〝型血是由于H基因发生突变,hh基因型不能使抗原前体转变为H抗原,因此即使有IA或IB基因,也不能形成A抗原或B抗原,因而不表现()或()表型。
参考答案:A型 ;B型
The president was so absorbed in his work that not a sound ______. [ ]
A. did she dare to make
B. dared she to make
C. she dared make
D. she did dare to make
有些人认为身体是心的因,因为身体受损时心也有所改变。请以理证遮破这种观点。