在线性规划问题的典式中,基变量的系数列向量为() A.单位阵 B.非单位阵 C.单位

题型:单项选择题

问题:

在线性规划问题的典式中,基变量的系数列向量为()

A.单位阵

B.非单位阵

C.单位行向量

D.单位列向量

考点:运筹学运筹学题库
题型:单项选择题

Look at my pictures, I took them in New York.  They _____beautiful.   [ ]

A. look     

B. sound      

C. read      

D. see

题型:单项选择题

M1432A机床的机械修理复杂系数为( )。

A.1

B.10

C.5

D.15

题型:单项选择题

二.完形填空:

Why did I come today? I wondered. My Christmas   16   contained several people that claimed they wanted nothing but I knew their feelings would be hurt   17   I didn’t buy them anything, so gift buying was   18   but fun.

Hurriedly, I finished shopping and   19   the long checkout lines. In front of me were a boy of about 5 and a younger girl. She carried a beautiful pair of    20   slippers. When we finally   21   the checkout register, the girl   22   placed the shoes on the counter. She treated them as though they were a   23  .

“That will be $ 6.09,” the cashier said. The boy   24   his pockets. He finally came up with $ 3.12. “I guess we will have to put them back,” he   25   said. “We will come back some other time, maybe tomorrow.” With that statement, a soft   26   broke from the little girl. “But Jesus would have loved these shoes,” she cried.

“Well, we’ll go home and work some more. Don’t cry. We’ll surely   27  ,” he said. Quickly I handed $ 3.00 to the cashier. These children had waited in line for a long time. And,   28  , it was Christmas. Suddenly a pair of arms came around me and a small voice   29   said, “Thank you, lady.” “What did you   30   when you said Jesus would like the shoes?” I asked. The boy answered, “Our mommy is sick and going to   31  . Daddy said she might go before Christmas to be with Jesus.” The girl spoke, “My Sunday school teacher said the streets in heaven are shiny gold, just like these shoes. Won’t mommy be   32   walking on those streets in these shoes?”

My eyes   33   as I looked into her tear-streaked face. “Yes,” I answered, “I am   34   she will.” Silently I thanked God for using these children to   35   me of the true spirit of giving.

16. A. plan                B. list                    C. goods                D. purchases

17. A. if                       B. because             C. unless               D. since

18. A. something           B. nothing             C. anything            D. everything

19. A. waited                B. joined               C. attended            D. gathered

20. A. cotton                 B. leather                     C. gold                  D. silver

21. A. approached         B. passed               C. checked             D. found

22. A. immediately        B. hesitantly          C. shyly               D. carefully

23. A. gift                    B. treasure             C. life                   D. prize

24. A. opened               B. touched             C. tore                  D. searched

25. A. bravely               B. uncertainly        C. slowly               D. doubtfully

26. A. tear                    B. sob                   C. smile                D. sigh

27. A. leave                  B. come                C. return               D. arrive

28. A. above all             B. at last                C. at least                     D. after all

29. A. gratefully            B. sweetly             C. gracefully          D. kindly

30. A. request               B. expect               C. mean         D. attempt

31. A. hospital                     B. tomb                 C. heaven                     D. sky

32. A. equal                  B. comfortable              C. convenient         D. beautiful

33. A. pained                B. flooded             C. shut                  D. froze

34. A. sure                    B. afraid                C. glad                  D. confident

35. A. inform                B. warn                 C. cure                  D. remind

题型:单项选择题

If , where p and q are nonzero integers, is n an integer ?()

(1)n2 is an integer.

(2) is an integer.

A.条件(1)充分,但条件(2)不充分.

B.条件(2)充分,但条件(1)不充分.

C.条件(1)和(2)单独都不充分,但条件(1)和条件(2)联合起来充分.

D.条件(1)充分,条件(2)也充分.

E.条件(1)和条件(2)单独都不充分,条件(1)和条件(2)联合起来也不充分.

题型:单项选择题

雷诺数代表流体流动中()与()的比值。

A.惯性力/重力

B.惯性力/阻力

C.惯性力/粘性力

D.惯性力/质量力

更多题库