托福考试

【单选题】
A、( To discover how long their ancestors lived
B、To analyze how their appearance has evolved
C、To find out how a disease has spread
D、To determine how closely groups of turtles are related

网考网参考答案：D
网考网解析：
[听力原文] How is DNA used in research on green turtles document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>