初二作业题

2025-02-19 00:17:09
推荐回答(2个)
回答1:

语文:1.文章借有关伯乐和千里马的传说,将封建统治者比作“ ”,将人才比作“ ”,而伯乐喻指“ ”,集中抨击社会现象是“ ”-(马说)
答案:饲马人 千里马 赏识他们的人 有志之士得不到赏识
2.作者在欣赏了岐山秀水后发出怎样的感慨?
答:鸢飞戾天者,望峰息心。经纶实务者,窥谷忘返。

数学:1.在四边形ABCD中,AD平行BC,且AD大于BC,BC=6cm,动点P,Q分别从A,C同时出发,P以1cm/s的速度由A向D运动,Q以2cm/s的速度由C向B运动,几秒后四边行ABQP为平行四边行?
答:(1).当Q在BC上,P在AD上,设时间为T,则据平行四边形的定义,AP=BQ,1*T=6-2*T,T=2
(2)当Q在CB延长线上,P在AD上,同理1*T=2*T-6,T=6

2:abc是三角形的三条边,且满足a^2c^2-b^2c^2=a^4-b^4问这个三角形是什么形状的三角形
答:a²c²-b²c²=a的4次方-b的4次方
分解因式 c²(a²-b²)=(a²+b²)(a²-b²)
移项 c²(a²-b²)-(a²+b²)(a²-b²)=0
提取公因式(a²-b²)[c²-(a²+b²)]=0
∴ a²-b²=0 或c²-(a²+b²)=0
当a²-b²=0,即(a+b)(a-b)=0时,因为a+b≠0,所以a-b=0,所以a=b,此时△ABC是等腰三角形

当c²-(a²+b²)=0时,即c²=(a²+b²),由勾股定理的逆定理可知,△ABC是直角三角形
综上所述,△ABC是等腰三角形或直角三角形

英语:1.People will have _____in their home in the future. (robots)
2.这些学校有数以千计的学生
These schools have hundres of students.

历史:1.下列哪一项不是第一届中国人民政治协商会议通过的决议(B )
A.以“共同纲领”为施政方针
B.以《义勇军进行曲》为国歌
C.在天安门广场建立一座人民英雄纪念碑
D.采用公元纪年
2.列举出第一个五年计划期间任意三项或更多的国家建设成就
答:A长春第一汽车制造厂建成投产
B中国试制成功第一架喷气式飞机
C沈阳第一机床厂建成投产
D武汉长江大桥建成
E川藏、青藏、新藏公路建成
F东北工业基地形成

地理:1.为什么要在吐鲁番盆地修建坎儿井?
答:吐鲁番为中国陆地最低点,四面环山,终年气温高,修建坎儿井可以减少水分的蒸发同时,与当地的环境气候相符合,很适合当地的农业人民生活所需。

生物:1.什么是体内受精和体外受精?
答:体外受精和体内受精
成熟的精子和卵子由亲体排出体外,在水中相遇而结合,叫做体外受精。鱼和两栖动物都是体外受精的。这种受精方式不如体内受精可靠。
卵成熟后不排出体外,精子通过交配输入雌体,在雌体内与卵子结合,叫做体内受精。昆虫、爬行动物、鸟和哺乳动物都是体内受精的。

政治:1.一个小孩拿着一张30分的试卷对他父母说:"爸妈,我真的不想上学了。“
问:小孩做的有什么不对?
答:每个人都应该接受九年的义务教育 ,所有适龄儿童、少年必须接受的教育,是国家必须予以保障的公益性事业。

物理:1.甲、乙两个质量均匀实心正方体放在水平地面上,它们对地面的压强相等。若在两个正方体的上部,沿水平方向分别截取去相同高度的部分,则剩余部分对对水平地面的压强关系是(B)
A.P甲B.P甲=P乙
C.P甲>P乙
D.无法比较

其它是什么~

回答2:

1.孔子是哪个朝代的?他爸爸叫什么?
2.从1+100再加多少再开平方=4?1到9的数字怎么做才=100[加减乘除皆可]
3.don't open yello gane ? 是什么意思 i love you 在英国还有什么意思 还可以代表什么 ?
4.端午节的由来?
5.人体为什么会有一个新陈代谢的过程?
6.重庆为什么严打?
7.为什么会下雨?
8.为什么你这么傻,作业少了啊 ,还是太空了

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