Official 39 Lec 4
答题结果:0/6
答题时间:0''
Question 3 of 6
What is the professor's opinion about corn-based ethanol?

A.

She thinks using it in motor vehicles may harm the environment.

B.

She thinks it is not an energy-efficient alternative to gasoline.

C.

She thinks it will eventually become cheaper to produce.

D.

She thinks researchers should invest more in its development.

我的答案:

正确答案:B

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