试验表明:端焊缝的强度和塑性高于侧焊缝。
参考答案:错
解析:…塑性低于侧焊缝
The manager is said to have arrived back from Paris where he _______ some European business partners.
A.would meet
B.is meeting
C.meets
D.had met
从轴上拆卸联轴器应使用专用工具进行,必要时可用火焰加热到()左右。
A.150℃
B.200℃
C.250℃
D.300℃