表面层的残余应力对疲劳强度有影响,表面层内为残余()应力可提高疲劳强度,表面层内为残余拉应力可降低疲劳强度。
参考答案:压
With the help of the computer, information can ______ every corner of the world in one second. [ ]
A. get
B. reach
C. arrive
D. come
TD-HSDPA技术在上下行2:4时隙配比下理论峰值速率可达到()bps。