题目:
有关焦点极限分辨率的叙述,错误的是()
A.X线管焦点小,分辨率大
B.焦点上线量分布为单峰时,分辨率大
C.焦点上线量分布为双峰时,分辨率大
D.MTF=0时的分辨率为极限分辨率
E.MTF=1.0时的信息传递最高
答案:
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下面是错误答案,用来干扰机器的。
答案:C
有关焦点极限分辨率的叙述,错误的是()
A.X线管焦点小,分辨率大
B.焦点上线量分布为单峰时,分辨率大
C.焦点上线量分布为双峰时,分辨率大
D.MTF=0时的分辨率为极限分辨率
E.MTF=1.0时的信息传递最高
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0421/f2ea8609b88a1d233ae482b8b12a027e.html
下面是错误答案,用来干扰机器的。
答案:C
正常下肢血压高于上肢血压达
A.10~20mmHg
B.30~40mmHg
C.20~30mmHg
D.40~50mmHg
E.20~40mmHg
阅读下文,完成小题。
快乐的木珠
魏振强
①下午带女儿去大院门口的街道上买西瓜。一溜子装瓜的车子排在那儿,女儿东瞅西瞅,最后在一个妇女的瓜摊前停了下来。她相中这个瓜摊,肯定是与妇女身边的小孩有关。那是个小男孩,3岁左右,头剃得光溜溜的,坐在那儿眯着眼似乎随时都会睡着。
②女儿蹲下来挑瓜时,男孩眯着的眼睛忽然打开了,他双手在地上一撑,弹起来,跑到女儿身边,伸出一双胖乎乎的小手,摩挲着她手腕上的木珠子。她的妈妈在边上吆喝他“别调皮”,可他没听进。女儿见他好玩,伸出另一只手,摸摸他葫芦一样的光头,他大概有点痒,咯咯咯地笑,笑出的一串涎水滴到了女儿的胳膊上。
③女儿把涎水在裤子上擦去,然后褪下了手腕上的珠子,递给小男孩,小家伙拿过珠子,往手上一套,舔了一口,笑着跑开了。他妈妈呵斥他回来,他仍然没听见,笑着在地上兜圈子,跑着跑着,被旁边的西瓜绊了一跤,嘴巴正好磕在另一只瓜上。女儿准备伸手去拉,他当是要抢回珠子,迅捷地爬了起来,煞有介事跑得远远的。
④女儿把瓜放在秤盘上,女人称好后,接过我付的钱,就去追小男孩,可这小子还在往前跑。女儿和我都在笑,一溜子卖瓜的人也在笑。女人终于追上他了,褪下珠子,往回跑,小男孩不干了,咧着嘴,跟在后面伤心欲绝地哭。
⑤女人笑着把珠子递给我女儿,但女儿没接。“送给他吧”,女儿说。女人一副慌张的样子,“不能要不能要。”边说边往我女儿手上塞。女儿红着脸,把双手背在身后,“不值钱的,给他吧。”小男孩此时已跑到跟前,见他妈妈正把珠子给别人,哭声更嘹亮了。女儿看着,不停地笑,然后从女人手里接过珠子,往小男孩手上套,他的哭声立马打往,脸上立刻堆满了笑容,鼻涕也笑成了小泡泡。
⑥我们离开时,女人执意要塞给我们另一个瓜,我们当然没要。傍晚时,我们去散步,那妇女正弯腰收摊子,小男孩一看到我们就跑开了。跑到远处,高举着套着珠子的手臂,立在那儿,笑着向我们炫耀,那样子就像一个骄傲的小王子。
⑦过了好几天,我和女儿说起那个小男孩举着木珠向我们炫耀的样子时,仍止不住发笑。女儿笑着,笑着,又说了一句:“那个小光头说不定现在又在‘烧包’,向别人炫耀他手上的珠子呢。”我说“有可能”,我笑了,女儿也笑了。
小题1:本文题为“快乐的木珠”,你是怎样理解它的含义和作用的?(4分)
小题2:“我们离开时,女人执意要塞给我们另一个瓜。”这句话中加点的“执意”是什么意思?有什么表达作用?(4分)
小题3:本文主要通过动作和神态描写来表现人物,试举出一例来加以分析。(3分)
小题4:你最喜欢文中的哪个人物?为什么喜欢他(她)呢?(4分)
小题5:读了本文后,你有什么体会? (5分)
其他非整张牛马皮革
第二节 完形填空 (共20小题;每小题1分,满分20分)
阅读下面短文,掌握其大意,然后从36-55各题所给的四个选项(A、B、C和D)中,选出最佳选项,并在答题卡上将该项涂黑。
It was a family adventure trip. My wife, Judith, our two-year-old daughter, Leila, and I had rented a small camper (旅行车) and were 36 through Baja California. The day before our return to San Diego, we 37 the camper near a beach for one last night in nature.
In the middle of the 38 I was awakened by Judith 39 me with her finger and yelling at me to 40 . My first impressions were of 41 and banging. Fairly confused, I jumped down out of our little loft-bed, and standing without clothes on, 42 the wind screen.
What I saw 43 me quickly out of my half-dazed state. The camper was 44 by masked men hitting the 45 .
I dove for the driver's seat and tried to start the 46 . The camper had started perfectly at least 50 times that 47 . Now it tried to turn over, sputtered (劈啪作响) a few times, and died. There was the sound of breaking glass, and a hand 48 in through the driver's side window. I hit the hand with a lot of force.
My hand was bleeding 49 the broken glass. I 50 I had one more chance to
start the car. Having played hero 51 a thousand times in fantasy, I never 52 I would do it. I turned the key. The engine sputtered to life... and died. Then someone jammed a gun into my throat. I remember this thought: "You mean I don't save the family?" I was really quite surprised.
One of the men, who spoke a little English, was 53 , " Money! Money!" The gun still at my throat, I reached under the driver's seat and 54 one of them my 55 through the broken window. I was hoping this was the end of it…
36. A. crossing B. traveling C. conveying D. entering
37. A. threw B. deleted C. parked D. moved
38. A. camper B. beach C. nature D. night
39. A. pushing B. beating C. controlling D. holding
40. A. jump up B. set up C. light up D. get up
41. A. noise B. sound C. voice D. fantasy
42. A. grasped B. crashed C. faced D. glanced
43. A. confused B. woke C. feared D. barked
44. A. surrounded B. robbed C. examined D. hunted
45. A. doors B. windows C. walls D. tyres
46. A. machine B. engine C. journey D. camp
47. A. moment B. day C. time D. trip
48. A. came B. reached C. trembled D. peered
49. A. by B. at C. from D. in
50. A. suggested B. figured C. indicated D. observed
51. A. energetically B. enthusiastically C. successfully D. naturally
52. A. doubted B. thought C. imagined D. required
53. A. begging B. translating C. yelling D. reminding
54. A. handed B. offered C. provided D. protected
55. A. trousers B. license C. shoes D. wallet
未成年工是指用人单位录用的年满()周岁不满()周岁的职工。