随焊接热过程而变化的内应力场和构件变形,称为()。
A. 焊接残余应力
B. 焊接残余变形
C. 瞬态应力与变形
D. 塑性应力与变形
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将各种通信设备组合成一个系统,以传递语音信号为主,兼有数据传递功能,以保持建筑物内外通信畅通,达到各类信号源提供的信号可以共享的目的的系统是()。
A. 信息网络系统
B. 通信网络系统
C. 出入控制干系统
D. 综合布线系统
要实现热能与机械能的转换需通过()的变化才能完成。
A. 高温状态
B. 低温状态
C. 工质状态
D. 平衡状态
Which of the following is true of the text?
A. Religion once functioned as a reminder of misery.
B. Art provides a balance between expectation and reality.
C. People feel disappointed at the realities of morality.
D. Mass media are inclined to cover disasters and deaths.
A.Nineteen million dollars.B.Thirty- two million dollars.C.Thirty-seven million dollar
A. Nineteen million dollars.
B. Thirty- two million dollars.
C. Thirty-seven million dollars.
D. Forty-two million dollars.