问删除其中没有NA值的数据框中的空行[保留]

EN

structure(list(STREET.ADDRESS = structure(c(1L, 1L, 1L, 1L, 1L
), .Label = c("", "102 HEARTLAND BLVD", "105 SANDSTONE DR", "1076 CORNERSTONE ST NE", 
"12 EVANSFIELD CRES NW", "121 RANCHERS VIEW", "1305 HAINSTOCK WAY SW", 
"1309 HAINSTOCK WAY SW", "13555 96 AVE", "146 DRAKE LANDING GDNS", 
"16828 BOXWOOD DR", "19 MONT CLARE PL", "1989 36TH AVE E", "2 WATKISS WAY", 
"20087 68 AVE", "20451 84 AVE", "22567 96 AVE NW", "239 WILLOW PL", 
"255 MCNAUGHTON AVE", "2578 JAMES ST", "289 MOUNTAINVIEW DR", 
"3020 GLADWIN RD", "316 SOUTH HARMONY DR", "350 LATORIA BLVD", 
"3500 BURKE VILLAGE PROM", "361 RAVENSTERN LINK SE", "41360 SKYRIDGE PL", 
"45545 KIPP AVE", "586 DUGGAN LANE", "6533 BUSWELL ST", "710 STOCKWELL AVE", 
"713 TREANOR AVE", "77 RED EMBERS MANOR NE", "777 BATTLE ST", 
"7828 GRANVILLE ST", "7908 15TH AVE", "809 VILLAGE DR", "9 CRESTBROOK WAY SW", 
"9250 CORBOULD ST", "95 LEGACY CIR SE", "9812 224 ST NW", "9889 SEVENTH ST", 
"CORNERSTONE BLVD NE", "GLENRIDDING BLVD SW", "LAKEVIEW DRIVE"
), class = "factor"), CITY = structure(c(1L, 1L, 1L, 1L, 1L), .Label = c("", 
"ABBOTSFORD", "AIRDRIE", "BURNABY", "CALGARY", "CHILLIWACK", 
"COCHRANE", "COQUITLAM", "EDMONTON", "KAMLOOPS", "KELOWNA", "LANGLEY", 
"OKOTOKS", "PARKSVILLE", "PORT COQUITLAM", "PRINCE ALBERT", "QUESNEL", 
"RICHMOND", "SQUAMISH", "ST ALBERT", "SURREY", "VANCOUVER", "VICTORIA"
), class = "factor"), PROVINCE = structure(c(1L, 1L, 1L, 1L, 
1L), .Label = c("", "ALBERTA", "BRITISH COLUMBIA", "SASKATCHEWAN"
), class = "factor"), POSTAL.CODE = structure(c(1L, 1L, 1L, 1L, 
1L), .Label = c("", "T1S0N2", "T1S0P9", "T1S5R7", "T1S5R9", "T2X0W9", 
"T3B6G3", "T3N1G8", "T3N1H2", "T3N1K7", "T3P1J8", "T3Z0E5", "T4A0W5", 
"T4C0W2", "T4C2P8", "T5T7B8", "T5T7K4", "T6W3B6", "T8N3Y1", "V1Y6V9", 
"V2C2M6", "V2J0C3", "V2P0H4", "V2P0H5", "V2T0H4", "V2T0H8", "V2Y0X5", 
"V2Y0Y2", "V3B0P6", "V3E0N2", "V3N0G6", "V3V0E4", "V4N6T2", "V5P1C7", 
"V6P4Z2", "V6Y0J6", "V8B0Y6", "V8L2V8", "V8Z0E6", "V9B0X5", "V9C0M9", 
"V9P1A5"), class = "factor"), X = c(NA, NA, NA, NA, NA), X.1 = c(NA, 
NA, NA, NA, NA), X.2 = c(NA, NA, NA, NA, NA), X.3 = c(NA, NA, 
NA, NA, NA), X.4 = c(NA, NA, NA, NA, NA), X.5 = c(NA, NA, NA, 
NA, NA)), .Names = c("STREET.ADDRESS", "CITY", "PROVINCE", "POSTAL.CODE", 
"X", "X.1", "X.2", "X.3", "X.4", "X.5"), row.names = 46:50, class = "data.frame")