桥梁设计和施工中，要进行强度刚度和稳定性验算，其中刚度是指( )。
A．应力
B．应变
C．挠度(变形)
D．预拱度
参考答案：C
—Are you _______ to go hiking with us?
— Yes, I _______.
A．good enough; good
B．well enough; think so
C．enough good; think so
D．well enough; am good
i5T3.6智能车床为何种精度等级？
