下列哪一项不是丙型肝炎的传染途径（）
A.输血或血制品途径
B.粪-口途径
C.注射途径
D.母婴传播
E.密切接触
参考答案：B
Last summer holidays, he went to the countryside and worked together with farmers.In this way
he learnt________from farmers. [ ]
A. a great many
B. a great deal
C. scores of
D. much more
脱硫塔氮气置换前首先将塔的（）全部排至富胺罐同时也将塔的（）排放至放空大罐。
A、气体；液体
B、液体；气体
C、气体；气体
D、液体；液体
