13春天津大学《数值计算方法》在线作业二

川农《英语Ⅰ》在线作业
试卷总分：100
单选题
一、单选题（共 20 道试题，共 100 分。）
V
1. That small country has ______ independence.
A. ordered
B. exclaimed
C. performed
D. declared
此题选: D 满分：5 分
2. China has great _______ to become an economic power in not too long a time.
A. chance
B. concern
C. potential
D. opportunity
满分：5 分
3. The teacher told Bob that if he started working hard right now, he still ___________ of passing the final exam.
A. stood chance
B. held chance
C. stood by chance
D. stood a chance
此题选: D 满分：5 分
4. The new office boy seemed smart and ________ when he reported for work.
A. attractive
B. individual
C. energetic
D. energy
满分：5 分
5. We often __________ advice which we do not wish to hear.
A. ignore
B. stick
C. draft
D. approach
满分：5 分
6. That hairstyle was _________ a passing fad, as no one wears it this year.
A. system
B. merely
C. rival
D. major
满分：5 分
7. They watched little Stevie dart from one instrument to the next, playing each one _____.
A. at ease
B. with ease
C. ease in
D. easy
满分：5 分
8. As the clouds drifted away, an even higher peak became _________ to the climbers.
A. in sight
B. visible
C. obvious
D. apparent
满分：5 分
9. A voice _______ the program to announce the election results.
A. broke into
B. broke off
C. cut down
D. cut out
满分：5 分
10. You’ll notice that this railway runs roughly _______ to a river.
A. entirely
B. halfway
C. parallel
D. relevant
满分：5 分
11. Dont talk about her sons behavior at school. Its a(n)________ subject to her.
A. awkward
B. embarrassing
C. nervous
D. disgraced
满分：5 分
12. Id like to ________ the holiday arrangements once more before we leave tomorrow.
A. go for
B. go over
C. go round
D. go about
满分：5 分
13. He talked so much during the chess match that he _________ the game.
A. distracted me from
B. kept me from
C. prevented me from
D. stopped me from
满分：5 分
14. When she found her child was running a high fever, she ________ took him to hospital.
A. promptly
B. prompt
C. promote
D. property
满分：5 分
15. The boy has _________ his fear of failure and is making great progress in his studies.
A. performed
B. broken into
C. got tired of
D. conquer
此题选: D 满分：5 分
16. Tom has got a decent ______ in a chemical factory.
A. job
B. employment
C. work
D. profession
满分：5 分
17. These figures are not consistent with the result obtained in _________ experiments.
A. previous
B. prepared
C. relative
D. original
满分：5 分
18. She talked to him for a long time and _____ him from doing that dangerous job.
A. persuaded
B. dissuaded
C. overcame
D. conquered
满分：5 分
19. Up to now there has been no ___________ to the government’s new decision from the public.
A. prospect
B. respond
C. response
D. relative
满分：5 分
20. When you read a book in a hurry, you can _______ some less important details.
A. leave
B. skid
C. skip
D. skin
满分：5 分
川农《英语Ⅱ》在线作业
试卷总分：100
单选题
一、单选题（共 20 道试题，共 100 分。）
V
1. He knows the rule but does not know how to _______ it.
A. control
B. direct
C. apply
D. run
满分：5 分
2. It is requested that rent for the house _______ in advance.
A. will have to be paid
B. has to be paid
C. should have to be paid
D. should be paid
此题选: D 满分：5 分
3. When I feel very tired in serving the customers _______ is a smile from them.
A. all the thing is needed
B. all what is needed
C. all that is needed
D. all which is needed
满分：5 分
4. The boy began to tell us all the wonders he had seen in his travels _________ great detail.
A. with
B. by
C. in
D. of
满分：5 分
5. I wonder why they _______ you so much money for such a book.
A. asked
B. required
C. requested
D. charged
此题选: D 满分：5 分
6. The girl fainted, but she _______ after we splashed water on her face.
A. came up
B. got over
C. came over
D. came to
此题选: D 满分：5 分
7. The representatives of the two sides have now agreed _______ the proposals to be put before their members.
A. on
B. with
C. to
D. about
满分：5 分
8. For this question, you are only required to state the_____ facts.
A. empty
B. bare
C. vacant
D. deserted
满分：5 分
9. The offence ________ which he is going to be charged carries a heavy penalty.
A. at
B. with
C. of
D. on
满分：5 分
10. "Thank you for your perfect control. Without you, ______" said the host.
A. we would be attacked by the cobra
B. we should be attacked by the cobra
C. we have been attacked by the cobra
D. we would have been attacked by the cobra
此题选: D 满分：5 分
11. If you take this medicine twice a day it should _____ your cold.
A. heal
B. cure
C. treat
D. recover
满分：5 分
12. So far as is known, the original manuscripts of Shakespeares plays are no longer ________ existence.
A. for
B. on
C. at
D. in
此题选: D 满分：5 分
13. He is not so much _______ a help as I thought he would be.
A. of
B. in
C. at
D. as
满分：5 分
14. A good hunting dog is alert ________ every sound in the field.
A. with
B. to
C. at
D. on
满分：5 分
15. It is because he was too conceited _______ he failed in the interview.
A. that
B. so that
C. so
D. therefore
满分：5 分
16. "Do you think _____ they will bring back the death penalty soon?"
A. if
B. when
C. whether
D. that
此题选: D 满分：5 分
17. He has recently got an interesting ______ in a steel works.
A. job
B. employment
C. work
D. occupation
满分：5 分
18. was usual with him, he reviewed all the facts of the case after he had made the decision.
A. As
B. Such
C. So
D. What
满分：5 分
19. _______, I might have ended up dead.
A. Were he not to come to the rescue
B. Should he not come to the rescue
C. Had he not come to the rescue
D. If he did not come to the rescue
满分：5 分
20. On seeing the snake, the man sprang up ________ a start.
A. with
B. in
C. from
D. to
满分：5 分
《数值计算方法》在线作业一
试卷总分：100
单选题
判断题
一、单选题（共 10 道试题，共 50 分。）
V
1.
A. n+1 次多项式
B. n 次多项式
C. 次数小于 n 的多项式
D. 次数不超过 n 的多项式
此题选: D 满分：5 分
2.
A.
B.
C.
D.
此题选: D 满分：5 分
3.
A.
B.
C.
D.
此题选: D 满分：5 分
4.
A.
B.
C.
D.
满分：5 分
5.
A.

B.
C.
D.
满分：5 分
6.
A. .5
B. 0.5
C. 2
D. -2
满分：5 分
7. 解线性方程组的主元素消去法中选择主元的目的是()。
A. 控制舍入误差
B. 减小方法误差
C. 防止计算时溢出
D. 简化计算
满分：5 分
8. 求积公式研究的误差为()。
A. 观测误差
B. 模型误差
C. 舍入误差
D. 截断误差
此题选: D 满分：5 分
9.
A. 1,2,n
B. 2,3,n
C. 1,3,n
D. 1,4,n+1
满分：5 分
10.
A. 舍入
B. 观测
C. 模型
D. 截断
此题选: D 满分：5 分
《数值计算方法》在线作业一
试卷总分：100
单选题
判断题
二、判断题（共 10 道试题，共 50 分。）
V
1.
A. 错误
B. 正确
满分：5 分
2.
A. 错误
B. 正确
满分：5 分
3.
A. 错误
B. 正确
满分：5 分
4.
A. 错误
B. 正确
满分：5 分
5.
A. 错误
B. 正确
满分：5 分
6. 梯形求积公式和抛物线求积公式都是高精度方法。()
A. 错误
B. 正确
满分：5 分
7.
A. 错误
B. 正确
满分：5 分
8.
A. 错误
B. 正确
满分：5 分
9. 求非线性方程f(x)=0根的方法均是单步法。()
A. 错误
B. 正确
满分：5 分
10. 牛顿法是二阶收敛的。()
A. 错误
B. 正确
满分：5 分
《数值计算方法》在线作业二
试卷总分：100
单选题
判断题
一、单选题（共 10 道试题，共 50 分。）
V
1. ()是利用函数的值求自变量的值。
A. 三次样条插值
B. 反插值
C. 分段插值
D. 爱尔米特插值
满分：5 分
2. 三点的高斯型求积公式的代数精度为()。
A. 3
B. 4
C. 5
D. 2
满分：5 分
3. 当线性方程组满足()时称为超定方程组。
A. 未知数的个数等于方程的个数
B. 未知数的个数大于方程的个数
C. 未知数的个数小于方程的个数
D. 未知数的个数与方程的个数大小任意
满分：5 分
4.
A.
B.
C.
D.
满分：5 分
5.
A. 1
B. 2
C. 0
D. 3
满分：5 分
6. 幂法的收敛速度与特征值的分布()。
A. 有关
B. 无关
C. 不一定
D. 以上三个答案都不对
满分：5 分
7. 幂法是用来求矩阵()特征值及特征向量的迭代法。
A. 按模最大
B. 按模最小
C. 任意一个
D. 所有的。
满分：5 分
8. 梯形公式是求解常微分方程的()阶方法。
A. 2
B. 4
C. 3
D. 5
满分：5 分
9. 设f(-1)=1,f(0)=3,f(2)=4,则抛物插值多项式中x2的系数为()。
A. -0.5
B. 0.5
C. 2
D. -2
满分：5 分
10. 反幂法是用来求矩阵()特征值及相应特征向量的一种向量迭代法。
A. 按模最大
B. 按模最小
C. 全部
D. 任意一个
满分：5 分
《数值计算方法》在线作业二
试卷总分：100
单选题
判断题
二、判断题（共 10 道试题，共 50 分。）
V
1. 数据拟合的步骤首先是建立正规方程组。()
A. 错误
B. 正确
满分：5 分
2. 向前差分与向后差分不存在等量关系。()
A. 错误
B. 正确
满分：5 分
3. 逐次超松弛迭代法是高斯-赛德尔迭代法的一种加速方法。()
A. 错误
B. 正确
满分：5 分
4. 高斯-塞德尔迭代法一定比雅可比迭代法收敛快。()
A. 错误
B. 正确
满分：5 分
5. 梯形方法是一种隐式的多步法。()
A. 错误
B. 正确
满分：5 分
6. 利用最小二乘原理对一组数据找出合适的数学公式来拟合，首先应确定公式的类型。()
A. 错误
B. 正确
满分：5 分
7.
A. 错误
B. 正确
满分：5 分
8. 求解微分方程初值问题的二阶R-K方法是多步法。()
A. 错误
B. 正确
满分：5 分
9. 在等距节点的情况下，才能计算函数的差分。()
A. 错误
B. 正确
满分：5 分
10.
A. 错误
B. 正确
满分：5 分