《国家信息化发展战略纲要》中出现了许多技术关键词,其中3S指的是()
A.VS\GIS\GPS
B.RS\PS\GIS
C.RS\GIS\GPS
D.VS\PS\GIS
参考答案:C
It is very kind _____ you to help me with my lessons because it is very difficult _____me to learn them well.
A.of; for
B.of; of
C.for;of
D.for; for
人体每天需要的水分约为2500毫升,其中从食物中摄取的约为1200毫升,直接饮入的约为1300毫升.写出从食物中摄取的和直接饮入的水量的比,并化简.