According to the passage, ________ is the key factor to making ' Nowcasts' a reality.
A.scientific and technological advances such as radar, or satellites
B.computer scientist
C.meteorologists
D.advanced computer programs

A.A.scientific
B.computer
C.meteorologists
D.advanced

【参考答案】

A
解析：解决及时预报困难的关键因素是高科技的发展，所以选A。