对接接头一定是对接焊缝，角接接头一定是角焊缝。
TheplaceofScienceandTechnologyinModernLife.
Whatisnotthemeetingprocess?
Whatismostimportantwhenlaunchingnewproducts,flankerbrandsextensionsofwell-knownbrands,orinfrequentlypurchasedbrands;orgoingafteranundefinedtargetmarket.（）
Shonaneedstodofurtherresearchinorderto____.
Welookforwardtoreceivingyourquotationverysoon.