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为什么社会上做事很多人都不负责任 After they brought in the new machines,the factory produced______ cars in 2000 as the year beforeA.twice as many B.as many twice C.as twice many D.twice many as 说明理由= =. can he swim同义句()he()()swim? 已知关于x的方程x²+（2m+1）x+m²+2=0有两个不相等的实数根,试判断直线y=（2m-3）x-4m+7能否通过点（-2.4）,并说明理由 soon he can swim.soon he ___ ___ ___ ___ swim.同义句 改写句子,使原句与该句子意思相同或相近!(一_一词)1.The girl left her home a few days ago.She has not come back yet.The girl has__from her home for a few days .2.The doctor put down the telephone,left his home at once and hurried to 我国在经济方面有什么重大成就 若函数y=kx+2的图像与x轴、y轴的交点之间的距离为√5,则k的值为_____. （要过程） 近年来我国经济建设巨大成就表格 改写句子要和原句意思相符每空一词 分析”He can swim ”的句子成分 can he swim?变同意句怎么变? 14.15 13.14. 如图所示求大神解答13 14 15 按所给的引导词,改写下面的句子.Are there any table tennis rooms in the sports hall?Is there______ ______　_______ ________in the sports hall? 改写句子,一词一空.1.When she comes here,Ill tell you.____ ____ ____she arrives.2.They finished college in 1991.They ____ ____ college in 1991.3.All are here,but our English teacher isn't.____ is here ____our English teacher. 用所给词改写下列句子1、The children always play football in the afternoon.(now)2、Her mother likes sitting in front of their house.(at the moment)3、Let's go hiking this afternoon.(last week)4、The students are having a sport meeting.(u 七年级上语文第10课的意思 (a^x-1)/x x趋近于0的极限求法 Can you read the poem to me ,or is it personal?是选择疑问句么?中间省略了什么么? 济南是受不住大雪的,那些小山太秀气!（秀气表达的作用） 椭圆内已知pF1,pF2的长和圆的方程求三角形pf1f2面积公式方程都求出来了,就是不知道面积,有没有公式啊?求推倒 珠字开头的诗句是什么 求古诗句子里带珠和羽字. 已知sinx=四分之三,且角x的终边在第二象限,那么2x的终边在第几象限?这种题有什么规律吗?已知sinx=四分之三,且角x的终边在第二象限,那么2x的终边在第几象限?这种题有什么规律吗? 若sinx=-3/5,cosx=4/5,则角2x的终边位置在第几象限求过程谢谢 最好用坐标法, 证明 n+2.问：应如何正明?为什么? 只解答第二问 不用向量的方法做 只说第二问 不用向量做 (x-2) (x2-2x+5)?