题型:选择题 Ms.Zero was preparing food.Under one of the apple trees in the garden ______, smoking and looking at the harvest with a smile.A.stood her husband B.did her husband standC.her husband stoodD.her husband standing 查看答案
题型:单项选择题 在列管换热器中用饱和蒸汽加热空气。对此情况有如下论述:(甲)传热管的壁温接近加热蒸汽的温度,(乙)换热器的总传热系数K接近空气侧的对流传热系数,则()A.甲乙均合理B.甲乙均无理C.甲合理,乙无理D.甲无理,乙合理 查看答案
题型:单项选择题 根据《旅行社条例》规定,旅行社被吊销旅行社业务经营许可的,其主要负责人自旅行社业务经营许可被吊销之日起( )年内不得担任任何旅行社的主要负责人。A.1 B.3 C.4 D.5 查看答案