An analyst conducted a significance test to determine if the relationship between two variables was real or the result of chance. His null hypothesis is that the population correlation coefficient is equal to zero and his alternative hypothesis is that the population correlation coefficient is different from zero. He developed the following information:

The analyst conducted a:()

A. one-tailed test and can reject his null hypothesis.

B. two-tailed test and can reject his null hypothesis.

C. two-tailed test and cannot reject his null hypothesis.

如图是尿的形成过程示意图，下列说法正确的是：

A．①内的血液呈鲜红色，②内血液呈暗红色

B．⑤是肾小管，此处能对部分的葡萄糖、部分无机盐和大部分的水有重吸收作用

C．从成分上看，③血管内液体比④内液体多了葡萄糖

D．①、②、③、④、⑤内的液体均含水、无机盐、尿素