A-A+
According to the passage the primary benefit
问题详情
According to the passage, the primary benefit of the new research is that ______.
A．scientists can study the pituitary gland for the first time
B．the procedures are simpler and require fewer laboratory animals
C．the study of intact laboratory animals has now been rendered obsolete
D．researchers were able to discover prolactin
参考答案
正确答案：B
解析：根据短文，这项新研究的主要优点是步骤更加简单，而且不需要多少供实验用的动物。尽管本文有好几处提到了新研究的优点，但是第一段的第一句简洁地概括了新研究的优点。
