[GRASS-windows] How to import a tif?

[apachemaven]

My current location is spanish(the example data),and now I want to import a tif into the workplace,but after import,the raster map is blank,the cmd is"r.in.gdal -o input=D:/aaa6.tif output=temp",also I got six raster raster map temp.1 temp.2 and ...temp.6,they are all blank,also I wonder if I can know exectly how many raster maps I will get?
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