矿物质中尤其是()对公畜精液品质影响最大。
A、锌.锰.铜
B、钙.磷.锌
C、硒.铜.铁
D、钴.锰.锌
参考答案:B
镀锌后的出光处理一般是用()溶液。
A、硫酸和硝酸
B、盐酸和硫酸
C、硝酸和盐酸
D、铬酸和硝酸
下面程序段的输出结果是 class Test public static void main(String args[])MyThread t=new MyThread();t.displayOutput("t has been createD) ");t.start(); class MyThread extends Threadpublic void displayOutput(String s) System.out.println(s); public void run()displayOutput("t is running.");
A.t has been created.
B.t has been created. t is running.
C.t is running.
D.编译出错