与一段催化剂相同,二段催化剂再生后先用低压蒸汽再用空气降温。
参考答案:错
解析:与一段催化剂不同,二段催化剂再生后先用低压蒸汽再用氮气降温。
He said it was _____ impossible to buy the novel which was _____ worth reading.
A.very…very
B.very…quite
C.much…much
D.quite…well
什么是伪造产品产地的行为?