单项选择题：有如下程序段 if(x>0) { System.out.println("firs

题目：

有如下程序段 if(x>0) { System.out.println("first")；} else if (x > -4) { System.out.println("second")；} else { System.out.println("third")；} x的取值在什么范围内时，将打印出字符串“second"

A．x > 0

B．x > -4

C．x < = -4

D．x < = 0 & & x > -4

答案：

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参考答案：A解析：血清学试验时利用抗原或抗体特异性结合未检查抗原或抗体的方法。

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