it is the opinion of the scientists that a singal in the ＿＿of a simple arithmetic sequence might be understood．
问题描述：
it is the opinion of the scientists that a singal in the ＿＿of a simple arithmetic sequence might be understood．
a type
b form
两者区别和为什么选b?
答
in the form of是固定搭配,没办法,记住好了.