【单选题】We have to filter sensory input into recognizable images because______.
A.
it's impossible for us to process all the existing visual information
B.
what we perceive has to be significant
C.
we have to look at a face in complex shadows
D.
different cultures emphasize different perceptions
【简答题】游标卡尺按照精度等级分为0.02、()和0.13种。
【简答题】游标卡尺按照精度分为( )mm、( )mm和( )mm 3种。
【判断题】融资方式有私人借款、银行贷款、天使投资、风险投资、政府支持支持等。
【简答题】影响沉积物中重金属释放的主要因素有哪些?
【单选题】I think ______ impossible for him ______ the work without any help. [ ]