A-A+
Where are the scientists involved in the resea
问题详情
Where are the scientists involved in the research from？
A．They are from America.
B．They are from Canada.
C．They are from both America and Canada.
D．They are from neither America nor Canada.
参考答案
正确答案：C
解析：从文中可以看出，所涉及的科学家有来自美国NASA以及加拿大航天局。所以正确答案为C。
