第二节 听取信息 (共5小题;每小题1分,满分5分)
听下面一段对话,请根据题目要求,从所听到的内容中获取必要的信息,填人答题卡标号为16-20的空格中。听录音前,你将有10秒钟的阅题时间,录音读两遍。你将有90秒钟的作答时间。
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Both Dave and Maria are now
living in the same 16
____________________.Dave’s major is 17 _____________________ and now he is doing a 18 ___________________ job as a cook to pay for his tuition.He works 19 _________________. Maria changed majors from French to computer science because she found she might have difficulty finding a job 20 _________________. |
15.(本题满分13分)某厂用甲、乙两种原料生产A、B两种产品,已知生产1吨A产品,1吨B产品分别需要的甲、乙原料数,可获得的利润数及该厂现有原料数如下表所示.问:在现有原料下,A、B产品应各生产多少才能使利润总额最大?利润总额最大是多少?列产品和原料关系表如下:
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A产品 (1吨) |
B产品 (1吨) |
总原料 (吨) |
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甲原料(吨) |
2 |
5 |
10 |
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乙原料(吨) |
6 |
3 |
18 |
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利润(万元) |
4 |
3 |
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