【判断题】( )在正弦交流电的波形图中可看出交流电的最大值、初相位和周期。
【单选题】A unique selling proposition is a feature of a product that ______.
A.
attracts consumers in the market
B.
is highlighted in advertisements
C.
satisfies customer needs
D.
makes it different from other similar products
【单选题】三人独立地破译一个密码,他们能单独译出的概率分别为 则此密码被译出的概率为()
【简答题】在正弦交流电中,周期越长.频率越低,交流电变化越慢。
【单选题】What is an unique feature of horticulture ? _____________
A.
esthetic use of plants
【简答题】The Air Waybill is the most important document in air cargo transportation.It serves as( ).
【简答题】What is the unique feature of Chinese food?
【多选题】The Air Waybill is the most important document for a batch of air cargo transportation. It serves as( ).
A.
receipt and delivery of shipment
B.
evidence of contract of air cargo transportation
【判断题】交流电的有效值是交流电在一个周期内的平均值。( )