A-A+
Cornwall Research Facility in Salem primarily
问题详情
Cornwall Research Facility in Salem primarily focuses on lung cancer research______treatment.
A．so
B．nor
C．but
D．and
参考答案
正确答案：D
解析：根据上下文可知在横线上应该填入一个可以连接research和treatment的连词。查看四个选项可知选项(D)的and作为并列关系的连词是正确的答案。
