【判断题】如果引进的新品在产品类别、功能等方面与现存的品类存在同质性或者相似性,就会影响现存品类商品的销售,对消费者来说,新品的引进导致了选择问题,所有消费者都乐于选择。
【多选题】视频中主讲人提到了两个著名的人物,( ),他们曾经是“赤脚医生”。
【单选题】反击式水轮机按转轮区内水流相对于主轴流动方向的不同又可分为四种。其中,( )的水流从四周沿径向进入转轮,然后近似以轴向流出转轮。
【单选题】Teenagers _____ allowed to get the driving license. [ ]
【单选题】Sixteen year-olds _______ go out alone at nights. [ ]
A.
should be not allowed to
B.
should not be allowed to
【简答题】A.They should not be frightened by wild horses. B.They should not be disturbed by other noises. C.They should understand the horse's special language. D.They should be very patient and understanding.
【单选题】棘轮机构中采用了止回棘爪主要是为了 ( )