气焊、气割工作中,氧气的工作压力一般要求为(),乙炔的工作压力一般要求不大于()。
参考答案:0.1~0.4MPa;0.15MPa
— Jim has his wife do all the housework!Isn't he wise?
— Not really.He is________.[ ]
A. more wiser and lazy
B. wiser than lazy
C. more lazy than wise
D. lazier than wise
甲、乙之间订立一买卖合同。其后,双方达成补充协议,甲将其在合同中的债权全部转让给丙,乙将其在合同中的债权债务全部转让给丁。此时该合同的当事人是( )
A.甲、乙 B.丙、丁 C.甲、丙、丁 D.甲、乙、丙、丁