Official 46 Lec 4
Question 4 of 6
Why does the professor mention the trumpet and trombone?

A.

To compare the sound-generating properties of copper with those of zinc

B.

To exemplify the benefits of mixing copper with other metals

C.

To point out that copper can be shaped into a variety of forms

D.

To point out that objects containing copper can shine like gold

正确答案:B

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