大学英语B5一、交际英语1.- Jill, you look tired. Let's go for a walk.- _________A.Thank you, I'm really hungry. B.That's a good idea.C.You are welcome.D.You're wrong.答案:2.- Congratulations! You won the fir
SPECIFICATION FOR ULTRASONIC ANGLE-BEAM EXAMINATION OF STEEL PLATESSA-577/SA-577Miphone9(Identical with ASTM Specification A577/A577M-90.)1.Scope1.1This specification covers an ultrasonic angle-beamproc