下列哪项技术不是基于串行数据传输原理的。()
A.USB2.0
B.ECP
C.IEEE1394
D.HyperTransport
参考答案:B
All of us want very much to see these amusing movies,especially _____ you referred to just now.
A.any
B.it
C.the one
D.one
一般下轴瓦与轴承座的接触面积不得小于整个面积的()上轴瓦与轴承盖的接触面积不得小于整个面积的
A.30%20%
B.40%30%
C.50%40%
D.60%50%