题目

At one time I was unemployed and money was running short. I needed a job   36    but it seemed as if no one was hiring. A very good friend of mine   37    me one day with an offer. I'm going to have to let this job go and I was wondering if you would like to take it   38   ?  That would be great, I replied. I went to speak with the   39    and he said he could use me, but never gave me a start date. Really needing the job, I made it a point to go and   40    with him every day. Finally he said, You can start Monday morning. I showed up for   41    extra对实数和定义运算“”：设函数，若函数恰有两个不同的零点，则实数的取值范围是（ ）A、 B、C、 D、