所謂可靠是指在概率的意義上，使平均故障間隔時間(兩個相鄰故障間時間的平均值)達到要求。
1、正確正確
暫無解析
Thisisourbestprice,____whichwehaveconcludedmanyorderswithotherbuyersinyourcity.()
名詞解釋：copyright
Traditionallinguistsbelievethatthewrittenformoflanguageis______tothespokenform.
YourfirmhasbeenrecommendedtousbytheJamesOlivier&Co.____wehavedonebusinessformanyyears
Wehavemade____thatwewouldaccept termsforyourpresentorder.
