数学英语作业,题目轻松答,积分等你拿,正确率要高!!!
1、已知x是相反数等于它本身的数,y是最大的负整数,求xy+x分之y+3x+2y的值2、某部队一次行军训练,限定3.5小时内完成,其间休息15分钟,去时的速度是每小时7千...
1、已知x是相反数等于它本身的数,y是最大的负整数,求xy+x分之y+3x+2y 的值 2、某部队一次行军训练,限定3.5小时内完成,其间休息15分钟,去时的速度是每小时7千米,回来时的速度是每小时6千米,问队伍最远走多少千米就得返回? 3、银行一年定期存款的年利率是2.25%。期满后还要交20%的利息税,小丽妈妈希望一年后得到的税后利息超过100元,问她现在将多少元钱存入银行?(结果为整百元) 4、从夏令营地到学校,先下山后走平路,某人骑自行车以12千米/时速度下山,再以9千米/时速度通过平地,用了1小时,返回时以8千米/时通过平路,6千米/时速度上山回到原地,共用1小时15分钟,求营地到学校有多远? 5、若y = 12 – ( 4 – x )² ,则x为何值时,y有最大值,最大值是多少? 6、如图所示,B、C是AD上两点,M是AB中点,N是CD中点,若MN=a,BC=b,求AD的长。(这图凑合着看看吧) A━━M━━B━━━C━N━D 7、计算: (1)145°26′49〃-72°15′53〃 (2)87.32°+ 42°36′42〃 8、已知两角之比为7:3,它们的差为72°,求这两个角的度数.它们互补吗 ? 9、已知 | a – 2 | + | b + 2 | = 0,求a + b的值 10、- 1.24与1.5和的相反数乘以 – 3.8,积是多少? 11、甲、乙两仓库存粮的吨数比为3∶5,今从两仓库各运走25吨粮,那么甲仓库存粮正好是乙仓库存粮的一半,问甲、乙两仓库共存粮多少吨? 12、将一张50元的人民币兑换5元和10元两种面值的纸币共7张,求5元和10元各几张? 13、小杰小明两人共有图书48本,小杰送2本给小明后,小杰的图书是小明的图书的2倍,问小杰、小明原来有多少本图书? 14、新光旅行公司组织旅游,今天到同一旅游区的旅游者共有720人,如果用载客量为42人的巴士接送,每辆一天的费用为650元,如果用载客量为60人的巴士接送,每辆一天的费用为900元,请你算一算,用哪一种巴士接送客人的费用省,为什么? IV. Read the passage and fill in the blanks with proper words. (在短文的空格内填入适当的词,使其内容通顺,每空格限填一词,首字母已给) All flowers n__1___ water. Most of the flowers need food, too. But they do not e__2___ cakes or hot dogs. Some flowers do eat flies. One k___3___ of flower is called flytrap. Along comes a fly, it stays on the flower. The flower shuts up q__4___. The fly can not get away. Then the flower eats the fly. You know why we c__5___ it a flytrap. n______ 2. e______ 3. k_______ 4. q_______ 5. c_______ IV. Choose the words or expressions and complete the passage. (选择最恰当的单词或词语,完成短文) It’s autumn now. Jimmy and I are going to the farm next Sunday. Jimmy’s uncle is a farmer. He works ___1___. Now he needs some ___2___there. It’s time___3___a good harvest. We’re going to help him___4___the farm work, and we think it’s___5___than school work. Jimmy is younger than I. But he is much stronger, and he is the strongest of us. So Jimmy’s uncle says, “I am going to give you the heaviest baskets than your friends.” We are going to work hard___6___Sunday. ( )1. A. in a farm B. on the farm house C. on the farm D. outside ( )2.A. help B. helping C. helps D. helped ( )3.A. to B. for C. on D. with ( )4.A. for B. with C. on D. from ( )5.A. good B. on C. to D. in
展开
1个回答
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询