弛豫
参考答案:施加恒定应变,则应力将随时间而减小,弹性模量也随时间而降低。
治理黄土高原的水土流失首先要()。
A、加固黄河大提
B、跨流域调水
C、制止滥垦土地
D、修建水库
It's not always easy for the public to see _____________ use a new invention can be of to human life.[ ]
A. whose
B. which
C. what
D. that