手工气割作业时根据割件厚度,适当选定()号码、氧气和乙炔压力及其他切割参数。
A、钻刀
B、割刀
C、割嘴
D、刀具
参考答案:C
— What's ____________ name?
— ____________ name is Li Ming.[ ]
A. his, his
B. his, His
C. her, Her
试述企业运用电子商务如何获得竞争优势。