（）是指生产商通过免费赠予消费者产品来获取关注声誉、劳动补偿或灵感表达。
A、直接交叉补贴
B、三方市场
C、免费加收费模式
D、非货币市场
参考答案：D
As we drew closer, I could see a whale by a pack of about six other killers.
A．attacked
B．to be attacked
C．having been attacked
D．being attacked
火力发电厂的供电煤耗与厂用电的关系是厂用电率越高，（）越高。
