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【多选题】
某含中性杂质的CaCO 3 样品,可以采用下列( )方法测定钙含量。A.
酸碱滴定法
B.
沉淀滴定法
C.
氧化还原滴定法
D.
配位滴定法
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举一反三
【单选题】Their chief aim is to reduce ________ pollution in the area.
A.
deal with
B.
the amount of
C.
rely on
D.
range from
【单选题】Their chief aim is to reduce _________ pollution in the area.
A.
the amount of
B.
deal with
C.
range from
D.
divide into
【单选题】下面程序执行后输出的结果是( )。 #include int m=13; int fun(int x, int y) { int m=3; return (x*y-m); } int main( ) { int a=7,b=5; printf("%d\n",fun(a,b)/m); return 0; }
A.
1
B.
2
C.
3
D.
4
【简答题】下面程序执行后输出的结果是______________。 public class Date { int y,m,d; Date(int yy,int mm,int dd) { y=yy; m=mm; d=dd; } public String toString() { return "year"+y+"month"+m+"day"+d; } public static void main(Str...
【简答题】影响高铁可达性水平的因素
【简答题】Their aim is to reduce the toxic levels of vehicle exhaust e________ (加s). 他们的目标是降低汽车排放尾气的毒性。
【单选题】One of the teachers says that their aim is to help ____ students. [ ]
A.
disable
B.
disabled
C.
disabling
D.
disability
【单选题】Their aim is to _____ child poverty in the country within 10 years.
A.
get rid
B.
eradicate
C.
do away
D.
root
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