下列反应既属于化合反应,又属于氧化反应的是[ ]
A.氯化氢+氨气→氯化氨
B.磷+氧气五氧化二磷
C.石蜡+氧气二氧化碳+水
D.二氧化碳+水→碳酸
答案:B
产业是指从事国民经济中同性质的生产或其他经济社会活动的经营单位和个体等构成的组织结构体系。( )
用 scene/scenery/view/sight填空
①There is a fine ___________ of the mountain from our hotel.
②There is a happy ___________ of children playing in the garden.
③ One of the beautiful ___________ is the castle.
④We all enjoyed the beautiful ___________ on our journey through the Lake District.