75.We can promote the welfare of mankind----peaceful use of atomic energy.A.in makingB.by making C.on makingD.for making

75.We can promote the welfare of mankind----peaceful use of atomic energy.A.in makingB.by making C.on makingD.for making
75.We can promote the welfare of mankind----peaceful use of atomic energy.
A.in making
B.by making
C.on making
D.for making

75.We can promote the welfare of mankind----peaceful use of atomic energy.A.in makingB.by making C.on makingD.for making
B
表示通过某种方式,用介词by
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B
by 通过。。手段

We can promote the welfare of mankind by making peaceful use of atomic energy.
通过和平利用原子能，我们可以提升人类的幸福度。