单选题The scientific approach to a problem consists first of all _____ collecting ample material.AwithBofCinDto
单选题
The scientific approach to a problem consists first of all _____ collecting ample material.
A
with
B
of
C
in
D
to
参考解析
解析：
consist in存在于。consist of由……组成。
consist in存在于。consist of由……组成。
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