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【简答题】
A Kate is reading something about how to keep healthy on the Internet. ◆ Good sleep is important for your health. You need about seven hours ’ sleep a night. Don ’ t eat or read in bed. Go to bed and get up at the same time every day. For more information, please visit www. sleeping. com. ◆ How often do you exercise? If you want to keep healthy, try to exercise for 30 minutes a day, three or four times a week. For more information, please call Health Line at 180-2000. ◆ Studies show that the cold or flu virus( 病毒) can live on our hands for long. So you should wash your hands often with soap. For more ways to prevent( 预防) the cold or flu, please call Health Line at 180-1313. ◆ Brush your teeth twice a day and see a dentist at least once a year. The examination is not only for the health of your teeth, but for the whole body. Please visit www. mydr. com for more information.
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【简答题】一台笼型三相异步电动机P N =75kW，U N =380V，n N =980r/min，λ m =2.15。采用变频调速，保持E 1 /f 1 恒定，若调速范围与上题相同，试计算频率为40Hz，30Hz时电动机的转速。
【简答题】已知:某公司生产和销售 A、B两种产品,A产品的单价为5元,B 产品的单价为2.5元;A产品的贡献边际率为40%,B产品的贡献边际率为30%,全月固定成本为72000元。假定本月份A产品的预计销售量为30000件,B产品的预计销售量为40000件。 要求:( 1)按综合贡献边际率法计算本月的综合保本额和A、B两种产品的保本量。 ( 2)计算企业的安全边际额和本月的预计利润。
【单选题】What is exceptionally remarkable about child is that ______.
A.
he is born with the capacity to speak
B.
he has a brain more complex than an animal
C.
he owes his speech ability to good nursing
D.
he can produce his own sentences
【单选题】He possesses a remarkable gift for music.
A.
ability
B.
capacity
C.
talent
D.
competence
【简答题】已知：某公司生产和销售A、B两种产品，A产品的单价为5元，B产品的单价为2．50元；A产品的贡献边际率为40％，B产品的贡献边际率为30％，全月固定成本72 000元。假定本月份A产品的预计销售量为30 000件，B产品为40 000件。 要求： (1)按综合贡献边际率法计算本月的综合保本额和A、B两种产品的保本量。 (2)计算企业的安全边际额和本月的预计利润。 (3)如果本月增加广告费9 700...
【单选题】He did the research in such a (remarkable) way that everyone says that he is really a man of creative mind选择能代替括号里的选项
A.
an outstanding
B.
an outstretched
C.
an uplifted
D.
an outspoken
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