托福考试

【单选题】
A、To learn how to prevent a bone disease.
B．To understand differences between bone tissue and other tissue.
C．To find out how specialized bone cells have evolve
D、

D、To create artificial bone tissue.

网考网参考答案：A
网考网解析：
According to the student, what is one important purpose of studying specialized cells in human bones document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>