甲、乙两人沿着圆形跑道匀速跑步,它们分别从直径AB两端同时相向起跑.可以确定圆形跑道的总长为460m. (1)第一次相遇时离A点100m. (2)第二次相遇时离B点60m.
A. 条件(1)充分,但条件(2)不充分.
B. 条件(2)充分,但条件(1)不充分.
C. 条件(1)和条件(2)单独都不充分,但条件(1)和条件(2)联合起来充分.
D. 条件(1)充分,条件(2)也充分.
E. 条件(1)和冬件(2)单独都不充分.条件(1)和条件(2)联合起来也不充分.
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甲:你不能再抽烟了,抽烟确实对你的健康非常不利。 乙:你错了,我这样抽烟已经15年了,但并没有患肺癌,上个月我才做的体检。 以下哪项如果为真,最能加强甲的意见
A. 对健康的危害不仅指患肺癌或其他明显疾病,还包括潜在的影响。
B. 如果不断抽烟,那么烟瘾将越来越大,以后就更难戒除了。
C. 抽烟不仅影响健康,而且还污染环境。
D. 与名牌的优质烟相比,冒牌劣质烟对健康的危害更甚。
E. 不抽烟也患肺癌等各种疾病的人也不少。
“丽园”开发公司生产960件新产品,需要精加工后,才能投放市场.现有甲、乙两个工厂都想加工这批产品,已知甲工厂单独加工完这批产品比乙工厂单独加工完这批产品多用20天,而乙工厂每天比甲工厂多加工8件产品,公司需付甲工厂加工费用每天80元,乙工厂加工费用每天120元,则甲工厂每天能加工______件新产品.
A. 24
B. 16
C. 18
D. 20
E. 15
For many women choosing whether to work or not to work outside their home is a luxury: they must work to survive. Others face a hard decision. Perhaps the easiest choice has to do with economics. One husband said, Marge and I decided after careful consideration that for her to go back to work at this moment was an extravagance we couldn t afford. With two preschool children, it soon became clear in their figuring that with babysitters , transportation, and increased taxes, rather than having more money, they might actually end up with less. Economic factors are usually the first to be considered, but they are not the most important. The most important aspects of the decision have to do with the emotional needs of each member of the family. It is in this area that husbands and wives find themselves having to face many confusing and conflicting feelings. There are many women who find that homemaking is boring or who feel imprisoned if they have to stay home with a young child or several children. On the other hand, there are women who think that homemaking gives them the deepest satisfaction. From my own experience. I would like to suggest that sometime the decision to go back to work is made in too much haste. There are few decisions that I now regret more. I wasn t mature enough to see how much I could have gained at home. I regret my impatience to get on with my career. I wish I had allowed myself the luxury of watching the world through my little girl s eyes. Questions: What are the two major considerations in deciding whether women should go out to work
For many women choosing whether to work or not to work outside their home is a luxury: they must work to survive. Others face a hard decision. Perhaps the easiest choice has to do with economics. One husband said, Marge and I decided after careful consideration that for her to go back to work at this moment was an extravagance we couldn t afford. With two preschool children, it soon became clear in their figuring that with babysitters , transportation, and increased taxes, rather than having more money, they might actually end up with less. Economic factors are usually the first to be considered, but they are not the most important. The most important aspects of the decision have to do with the emotional needs of each member of the family. It is in this area that husbands and wives find themselves having to face many confusing and conflicting feelings. There are many women who find that homemaking is boring or who feel imprisoned if they have to stay home with a young child or several children. On the other hand, there are women who think that homemaking gives them the deepest satisfaction. From my own experience. I would like to suggest that sometime the decision to go back to work is made in too much haste. There are few decisions that I now regret more. I wasn t mature enough to see how much I could have gained at home. I regret my impatience to get on with my career. I wish I had allowed myself the luxury of watching the world through my little girl s eyes. Questions: Some women would rather do housework and take care of their children than pursue a career because they feel ________.