使湿物料在热空气的吹动下上下翻腾的干燥设备称为（）
A．红外干燥器
B．喷雾干燥机
C．流化床干燥机
D．微波干燥器
E．箱式干燥器
参考答案：C
需要用大气中的氧气来助燃的喷气式发动机叫____________。
Since the shipment consists of seasonable goods, it is important that it is ______ as soon as possible.
A．deleted
B．demanded
C．delivered
D．detached
