题干
_________ is scientific knowledge used in practical ways in industry, for example, in making new machines.
A：Power
B：Technology
C：Software
答案(点此获取答案解析）
B
_________ is scientific knowledge used in practical ways in industry, for example, in making new machines.
A：Power
B：Technology
C：Software
A=600,
=
,
,则B等于 （ ）