试题与答案

下图中f(t)表示故障密度函数,则下列说法正确的是()。 A.A部分的面积代表的可靠

题型:单项选择题

题目:

下图中f(t)表示故障密度函数,则下列说法正确的是()。

A.A部分的面积代表的可靠度R(t0)

B.F(t0)表示的是t0时刻产品的不可靠度

C.B部分的面积代表的是不可靠度

D.F(t0)+R(t0)≠1

答案:

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Many people say their most painful moments are saying goodbye to those they love. After watching Cheryl, my daughter-in-law, through the six long months her mother suffered towards death, I think the most painful 36 can be in the waiting to say goodbye.

Cheryl made the two-hour trip over and over to be with her mother. They spent the long afternoons praying, comforting, and retelling their 37 memories.

As her mother was getting 38, Cheryl always sat for hours 39 watching her mother sleeping. Each time she kissed her mother before leaving, her mother would say in 40, “I’m sorry you drove so far and sat for so long and I didn’t even 41 up to talk with you.”

Cheryl would tell her it didn’t matter, still her mother felt 42 and apologized at each goodbye 43 the day Cheryl found a way to give her mother the same reassurance(安慰) her 44 had given to her so many times.

“Mom, do you 45 when I made the high school basketball team?” Cheryl’s mother nodded. “For every game you’d 46 so far and sit for so long and I never even left the bench to play. Each time I felt 47 and apologized to you for wasting your time.” Cheryl 48 took her mother’s hand.

“Do you remember what you would say to me?”

“I would say I didn’t come to see you 49, I came to see you.”

“And you 50 those words, didn’t you?”

“Yes, I really did.”

“Well, now I say the 51 words to you. I didn’t come to see you 52. I came to see you.”

Her mother understood and smiled as she floated back into sleep.

Their 53 together passed quietly into days, weeks, and months. To the last day they cared each other in the 54, love given and received just by seeing each other.

A love so strong that, 55 in this deepened silence that followed their last goodbye, Cheryl can still hear her mother’s love.

36. A. moments         B. business        C. consequences        D. failures

37. A. lost             B. buried          C. shared              D. frozen

38. A. thinner          B. stronger         C. better               D. worse

39. A. silently         B. excitedly        C. impatiently           D. desperately

40. A. laughter         B. tears            C. despair              D. happiness

41. A. catch           B. keep            C. wake                D. sit

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46. A. walk            B. run              C. ride                 D. drive

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48. A. quickly          B. eagerly           C. curiously             D. gently

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