A:more; less
B:less; less
C:fewer; fewer
D:less; more
1944年6月,盟军开辟欧洲第二战场,使德国陷入盟军两面夹击的战役是( )
你会做下列加法题吗?
①What's six and one? It's ____.
②What's two and three? It's ____.
③What's zero and nine? It's____.
④What's four and three? It's____.
⑤What's one and five? It's____.
牛的无角基因(B)对有角基因(b)为显性.一个有角母牛和无角雄牛杂交,生了一个有角小牛,则雄牛的基因组成是( )