在氯碱生产吸收HCl时产生的溶解热将液相不断加热,直至一定程度时部分水分汽化,将大部分溶解热除去的方法称为()。
A、冷却吸收
B、膜式吸收
C、绝热吸收
D、加热吸收
参考答案:C
---- Have you bought the best-sell book in the store near our school?
-----Yes, I _____ it three days ago,but I hear that they ________
A.have bought, sell out
B.bought, have been sold out
C.bought, have sold out
D.have had, have been sold out
2岁男童,生长发育迟缓,精神不佳,体重过轻,下肢轻度水肿,患儿可能缺乏的营养素是()
A.维生素C
B.钙
C.必需脂肪酸
D.碳水化合物
E.蛋白质