A-A+
To what extent will future scientific discover
问题详情
To what extent will future scientific discoveries make possible the ______ of human life span？
A．increase
B．expansion
C．growth
D．prolongation
参考答案
正确答案：D
解析：(prolongation延长)。句意为：未来的科学发现在多大的程度上使人类延长寿命?A．increase增加；B．expansion张开，伸展；C．growth生长。
