The results of experiment 2 show that from 199
问题详情
The results of experiment 2 show that,from 1993 to 2000, pH levels:
A.remained stable in the non-glacial lakes but increased in the glacial lakes.
B.decreased in the glacial lakes but decreased in the non-glacial lakes.
C.increased in the non-glacial lakes but decreased in the glacial lakes.
D.increased in the non-glacial lakes while remaining relatively stable in the glacial lakes.请帮忙给出正确答案和分析，谢谢！
参考答案
正确答案：B
The top cluster chart in Figure 2 shows pH levels in one of the two non-glacial lakes (denoted by hollow circles) slightly higher in 2000 than in 1993 (the x-value is slightly greater than the y-value), while for the other non-glacial lake there appears to have been little or no change (the level is just over 7 in both years). In contrast, the chart shows pH levels in all three glacial lakes (denoted by solid circles) to be significantly higher in 2000 than in 1993. (For each one, the x-value is significantly greater than the y-value.)
