从遗传距离与特点考虑,写出下列各组合所属的杂交方式:1)铁观音×安溪野生茶:远缘杂交;2)铁观音×黄旦();3)福云6号×云南大叶种:回交;
参考答案:近缘杂交
下面四位同学关于甘氨酸的说法正确的是( )
English has become the most wildly spoken language in the world ______ its special role as an international
language.[ ]
A. because
B. from
C. with
D. because of