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℃
