【简答题】信源编码的主要作用是__________、__________;信道编码的主要作用是__________、__________。
【判断题】信源编码的主要作用是:在保证通信质量的前提下,尽可能的通过对信源的压缩,提高通信时的有效性
【单选题】信源编码的主要作用是去掉信号中的沉余信息,降低传输码率、()频带宽度。
【单选题】如图所示的北美轮廓图中,1代表的是哪个港口?
【单选题】Why do people develop sociable robots?
A.
So that many people found this amazing.
B.
to be companions to the elderly, to our children, to us.
C.
to lose confidence in talking with others.
D.
to develop technology.
【单选题】承包人应在知道或应该知道索赔事件发生后()内,向发包人提交索赔意向通知书,说明发生索赔事件的事由。承包人逾期未发出索赔意向通知书的,丧失索赔的权利。
【多选题】仓库是食品原料的储存区域,下列描述直接影响原材料的保持和仓储成本的控制的因素是( )。
【单选题】下面哪一项和“ Most recent vaccines have taken years to develop.” 中的 develop 意思一致?
A.
Large cracks began to develop in the wall.
B.
The child is developing normally.
C.
Chicago developed into a big city in the late 1800s.
D.
Scientists are developing new drugs to treat arthritis.
【单选题】7 ,承包人应在发出索赔意向通知后的( )天内,正式提交索赔通知书。