题目内容
(请给出正确答案)
[主观题]
已知盐水若干千克,第一次加入一定量的水后,盐水浓度变为6%,第二次加入同样多的水后,盐水浓度变为
4%,第三次再加入同样多的水后盐水浓度是()。
A.0.03
B.0.025
C.0.02
D.0.018
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A.0.03
B.0.025
C.0.02
D.0.018
A.3%
B.2.5%
C.2%
D.1.8%
A.12%
B.10%
C.8.3%
D.8%
A.1.6%
B.1.5%
C.1.2%
D.1%
A.1%
B.1.2%
C.1.5%
D.1.67%
A.1.6%
B.1.5%
C.1.2%
D.1%
A.1%
B.1.2%
C.1.5%
D.1.67%
A.1%
B.2%
C.3%
D.3.5%
A.1%
B.2%
C.3%
D.3.5%
A.0.5%
B.1%
C.1.2%
D.1.5%
A.24%
B.21%
C.18%
D.15%