在绵羊的一些品种里,角的有无由从性基因控制,有角在雄性中是显性,在雌性中为隐性。一个由300只雌绵羊组成的样本中有75只有角个体,问:
雌性中杂合体比例是多少
参考答案:50%;
China is always carrying out foreign policies that are ______ enough to fit in with varieties of complicated
international situations. [ ]
A. particular
B. flexible
C. delicate
D. permanent
请写出下面程序的运行结果: public class Test extends TT public static void main(String args[])Test t=new Test("Tom."); public Test(String s)super(s);System.out.print("How are you"); public Test()this("I am Jack."); class TT public TT()System.out.print("Hi!"); public TT(String s)this();System.out.print("I am"+s); 结果: 【15】 。