专升本考试

【单选题】The article does not say whether the scientists' experiments with dogs have ______.
A．benefited animals other than dogs
B．served man
C．helped other dogs
D．contributed to medical knowledge
网考网参考答案：A
网考网解析：
文章最后指出，科学家们对狗的实验使狗免于犬瘟、狂犬病之类的疾病，而没有提及对其他动物有益。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>