血红素合成的关键酶是（）
A. HMG-COA合成酶
B. 7α-羟化酶
C. ALA合酶
D. 乙酰辅酶A羧化酶
Li Qiang is seeking a job and now he ishaving an interview with Ms. Chen. Listen to the conversation and choose thebest answer to each question you hear.
A. Tsinghua University.
B. Peking University.
C. Qingdao University.
D. Qinghai University.
2.
A technician.
B. A mechanic.
C. An engineer.
D. A director.
3.
A. He wants a raise in salary.
B. He doesn’t like his present employer.
C. He wants a growth opportunity.
D. He has to move to another city.
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