题目内容

For PART 2 (objective questions) of the OESC Final Exam (?? December, 2021 at ??, during week 17), match each of the following items to whether you areallowedorNOT allowedto use/do it during the exam period.

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Match the exam part below with the device you MUST use for that exam part.

3和-7的等差中项是( )

A. -1
B. -2
C. 0
D. 1

4和8的等差中项是( )

A. 12
B. 6
C. 5
D. 10

汽车选配发动机时,如果后备功率大,那么汽车在运行时()。

A. 动力性好,使用经济性差
B. 动力性好,使用经济性也好
C. 动力性差,使用经济性差
D. 动力性差,使用经济性好

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