7.曲线
在点
处的切线的倾斜角为 ( )
A.30° B.45° C.60° D. 120°
6.若对任意的
则
是 ( )
A.
B.
C.
D.
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5.已知命题
;命题
,则下列判断正确的是 ( )
A.
是真命题 B.
是假命题
C.
是假命题 D.
是假命题
4.对于两个变量
和
进行回归分析,得到一组样本数据:
,
,…
下列说法中错误的是 ( )
A.由样本数据得到的回归方程
必过样本中心
B.残差的平方和越小的模型,拟合的效果越好
C.用相关指数
来刻画回归效果,
越小,说明拟合效果越好
D.若变量
和
之间的相关系数为
,则变量
和
之间具有线性相关关系
3.在空间中,“两条直线没有公共点”是“这两条直线平行”的 ( )
A.充分不必要条件 B. 必要不充分条件
C.充要条件 D. 既不充分也不必要条件
2.
等于 ( )
A.
B.
C.
D.
1.已知全集U={1,2,3,4,5,6,7,8},M ={1,3,5,7},N ={5,6,7},则Cu( M
N)=
( )
A. {5,7} B. {2,4}
C.{2,4,8} D.{1,3,5,6,7}
2.
文章开头已给出(不计入词数)。
Recently more than 260,000 netizens have
participated in the survey about whether the curriculum of senior high school
should be divided into arts and science. …
2.
只允许修改10处,多者(从第11处起)不记分。
When I
walked into the classroom, the teacher was handing in the tests. I was feeling
very nervous. I had not studied at all the weekend as I had thought it would be
easy test.
I went
through the test for many times but I could only answer three out from the
twenty questions. I did not want to fail the exam. Then , I put my book under
my desk, opening it and started looking for the answer. The teacher wasn’t
looking at me ,but I copied something. Suddenly, I felt a hand in my shoulder!
The teacher caught me cheating. I don’t know what to say. Luckily, the teacher
did not punish for cheating but instead gave me a second chance.
![]()
第四部分 作文(满分30分)
最近,关于“高中是否取消文理分科”的网上调查吸引了26万余名网民的积极参与。
![]()
请根据所给的信息写一篇英文报道,描述被调查者的不同看法,并表明你的看法。
|
|
赞同文理分科(46%) |
不赞同文理分科(54%) |
你的看法 |
|
理由 |
如不分科,文、理都要学,增加了学生负担 |
如分科,学生知识面窄,不利于学生的发展 |
分科没有错,错在偏科;建议改革高考 |
注意:1. 词数不少于60;
1.
每处错误及修改均仅限一词;
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