U、Np、Pu、Am的+5、+6氧化态存在形式为_____________________,在这一点上和d区元素________________
How strange is the lot of us (1)_____! Each of us is here for a brief sojourn; for what purpose he knows not, though he sometimes thinks he senses it. But without deeper (2)_____ one knows from daily life that one exists for other people—first of all for those upon whose smiles and well-being our own happiness is wholly (3)_____, and then for the many unknown (4)_____ us, (5)_____ destinies we are bound by the ties of sympathy. A hundred times every day I remind myself (6)_____ my inner and outer life (7)_____ the labors of other men, living and dead, and that I must exert myself in order to give in the same measure (8)_____ I have received and am still receiving. I am strongly drawn to a frugal life and am often oppressively aware that I am engrossing an undue (9)_____ of the labor of my fellow-men. I regard class distinctions as unjustified and in the last resort, based on force. I also believe that a simple and unassuming life is good for everybody, physically and (10)_____.
I do not at all (11)_____ human freedom in the philosophical sense. Everybody acts not only under (12)_____ compulsion but also (13)_____ inner necessity. Schopenhauer's saying "A man can do what he wants; (14)_____ not want what he wants," has been a very real inspiration to me (15)_____ my youth; it has been a continual consolation (16)_____ life's hardships, my own and (17)_____, and an unfailing well-spring of tolerance. This realization mercifully mitigates the easily paralyzing sense of responsibility and prevents us from (18)_____ ourselves and other people (19)_____ seriously; it is (20)_____ a view of life which, in particular, gives humor its due.
A.mortals
B.morals
C.immortals
D.mortal
A.6 9 9
B.6 6 9
C.6 15 15
D.6 6 15
Dear Sir,
On my graduation from college this fall, I am desirous(1)securing a position that will offer me opportunity(2)the field of import and export trading.Knowing something of the scope and enterprise of your huge export department, I thought perhaps you would keep me(3)mind for a possible opening.
I am strong and alert, and shall be twenty years of age in July next year.
(4)present I am a student in the college--but I shall graduate(5)the college this coming July, finishing the requirements(6)three years, I have had no business experience, but my college record has been good.A copy
(7)my antecedents is enclosed(8)your reference.
Dr.B.Chao, President of the college, will be glad to tell you more(9)my character and ability, I shall be glad to call(10)any time for an interview.
Ⅶ.Filling the blanks with the given words below.
enclosing, apply for, with, apply to, meet, in addition to, in addition, prove, obliged, at, in, which Dear Sir,
(1)reply to your advertisement in www.JobsPower.com regarding a vacancy in your office, I wish to(2)the position of senior clerk,(3)you have specified.
I feel confident that I can(4)your special requirements indicating that the candidate must have a high command of English, for I graduated from the English Language Department of University three years ago.
(5)my study of English while in the University, I have worked for three years as secretary in the firm of ABC Trading Co, Ltd..
The main reason for changing my employments is to gain more experience(6)a superior trading company like yours.I believe that my education and experience will(7)useful for work in your office.
I am(8)my personal history, certificate of graduation and letter of recommendation from the president of the University, I shall be(9)if you will give me a personal interview(10)your convenience.
6. 题图电路中,已知U<sub>s1</sub>=6V,U<sub>s2</sub>=4V,R<sub>1</sub>=R<sub>2</sub>=1Ω,R<sub>3</sub>=4Ω,R<sub>4</sub>=R<sub>5</sub>=3Ω,R<sub>6</sub>=5Ω,选o点为参考点。求a,b,c,d各点电位。
运用多元函数条件极值理论推证:若xu是障碍问题(Pu)的最优解,则xu除满足Axu=b外,还满足
wuxu-nu其中,wu=c-uuA,uu是Lagrange乘子向量.并证明:xu和(uu,wu)分别是LP和DP的可行解,且对偶间隙
cxu-uub=wuxu→0(u→0+).
在大样本的调查研究中,智力测验的结果(智商)分布一般呈
A.偏态分配曲线
B.常态分配曲线
C.倒U字型曲线
D.负偏态分配曲线