采用配位滴定法测定蛋壳中钙镁的含量,为了消除Fe3+、Al3+的干扰,需加入( )作为掩蔽剂
A. 甲醇
B. 丙酮
C. 三乙醇胺
D. 乙醇
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单词互译:全球定位系统:( )space segment:( )control segment:( )user segment:( )GPS接收机:( )GPS星座:( )master control station:( )monitor station:( )Atomic clock:( )clock error:( )
单词互译:broadcast ephemeris:( )precise ephemeris:( ) Coarse/Acquisition Code (C/A code):( ) 精码:( )伪距:( )Ionospheric delay:( )tropospheric delay:( )多路径效应:( )Selective Availability (SA):( )
单词互译:基准接收机:( )流动接收机:( )receiver antenna:( )实时动态定位:( )differential GPS (DGPS) :( )差分改正:( )real-time differential correction :( )post-processed differential correction:( )