计算:12•(48-418)+18÷3.

题型:解答题

问题:

计算:
12
•(
48
-4
1
8
)+
18
÷
3
考点:二次根式的加减乘除混合运算,二次根式的化简
题型:解答题

三阶段设计是指初步设计、技术设计和施工图设计。( )

题型:解答题

20世纪60年代初对于非洲来说是一段值得纪念的历史,因为就是在其中的一年中有17个国家取得独立,这一年也被称为“非洲独立年”,这是在(    )

A.1960年

B.1961年

C.1962年

D.1964年

题型:解答题

______是信息系统处理数据的一般流程。

A.输入→输出→处理→反馈

B.输入→处理→输出→反馈

C.反馈→输入→处理→输出

D.处理→输入→输出→反馈

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One summer day my father sent me to buy wire for our farm. At 16, I liked 36 better than driving our truck, 37 this time I was not happy. My father had told me I’d have to ask for credit(赊账) at the store.

Sixteen is a 38 age, when a young man wants respect, not charity. It was 1976, and the ugly 39 of racial discrimination was 40 a fact of life. I’d seen my friends ask for credit and then stand, head down, while the store owner 41 whether they were “good for it.” I knew black youths just like me who were 42 like thieves by the store clerk each time they went into a grocery.

My family was 43 . We paid our debts. But before harvest, cash was short. Would the store owner 44 us ?

At Davis’s store, Buck Davis stood behind the cash desk, talking to a farmer. I nodded 45 I passed him on my way to the hardware shelves. When I brought my 46 to the cash desk, I said 47 , “I need to put this on credit.”

The farmer gave me an amused, distrustful 48 . But Buck’s face didn’t change.   “Sure,” he said 49 . “Your daddy is 50 good for it.” He  51 to the other man. “This here is one of James Williams’s sons.”

The farmer nodded in a neighborly 52 . I was filled with pride. James William’s son.  Those three words had opened a door to an adult’s respect and trust.

That day I discovered that the good name my parents had  53 brought our whole family the respect of our neighbors. Everyone knew what to 54 from a Williams: a decent person who kept his word and respected himself 55 much to do wrong.

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

37. A. and                   B. so                   C. but                  D. for

38. A. prideful            B. wonderful               C. respectful               D. colorful

39. A. intention           B. shadow            C. habit               D. faith

40. A. thus                  B. just                 C. still                 D. ever

41. A. guessed             B. suspected         C. questioned       D. figured

42. A. watched            B. caught             C. dismissed         D. accused

43. A. generous           B. honest             C. friendly           D. modest

44. A. blame               B. excuse             C. charge             D. trust

45. A. until                 B. as                   C. once                D. since

46. A. purchases          B. sales                C. orders             D. favorites

47. A. casually            B. confidently      C. cheerfully        D. carefully

48. A. look                        B. stare                C. response          D. comment

49. A. patiently           B. eagerly            C. easily              D. proudly

50. A generally            B. never              C. sometimes       D. always

51. A. pointed             B. replied            C. turned             D introduced

52. A. sense                       B. way                       C. degree             D. mood

53. A. earned              B. deserved          C. given              D. used

54. A. receive              B. expect             C. collect             D. require

55. A. very                        B. so                   C. how                D. Too

题型:解答题

有关原发性高血压发病机理的阐述,正确的是( )

A.由于肾素分泌过多导致
B.目前尚未完全阐明
C.由于过度紧张和精神刺激导致
D.由于醛固酮分泌增加多导致
E.由于钠盐摄人过多导致

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