__________A.at placeB.on dutyC.for controlD.in post
__________
A.at place
B.on duty
C.for control
D.in post
B.on duty
C.for control
D.in post
参考解析
解析：
相关考题：
电阻接在电源上，如图9—9所示．要测量电阻上的电压和通过的电流，下列哪种接法对（ ）A.E接N，F接M；H接N，G接PB.G接M，H接N；E接N，F接PC.E接M，F接N；G接N，H接PD.G接P，H接M；E接M，F接N
阅读文中“由于受到视野和视敏度的限制”一段，回答下列问题。对鹰眼的特点概括得准确的二项是：A.鹰眼能搜索、观测细小的目标。 B.鹰眼比人眼看得更广、更远。C.鹰眼比人眼的视野广阔得多。 D.鹰眼的视野广阔，视敏度高。
登高杜甫风急天高猿啸哀，渚清沙白鸟飞回①。无边落木萧萧下②，不尽长江滚滚来。万里悲秋常作客③，百年多病独登台④。艰难苦恨繁霜鬓⑤，潦倒新停浊酒杯⑥。对这首诗各联的理解，表达不恰当的一项是：A.首联写俯仰所见所闻，一连用六个词组组成几幅画面，渲染出秋江景物的特点，定下全诗基调。B.颔联写落叶萧萧，江流滚滚，流露出韶光易逝、壮志难酬的悲怆之情。C.颈联写诗人目睹这苍凉悲阔的秋景，想到了自己飘零异乡、老病孤愁的悲凉处境。D.尾联写诗人平生“艰难”“潦倒”，因病断酒，悲愁更甚，末句使诗的主旨得到深化。
以色列魏茨曼科学研究院凝聚物物理研究部威克斯曼博士和该院哈维德·施密斯索尼亚天体物理研究中心洛比教授，在日前出版的《自然》杂志上公布了他们对宇宙伽马射线成因提出的理论模型，以求破解这一困扰至今的天体物理之谜。 根据这一理论模型，科学家认为，到达地球的大部分伽马射线，实际上是引力引起的巨大冲击波的剩余能量。引力使星系气云自我坍塌，并产生巨大的疏散星团。这个过程中产生的电子以每秒l85000英里(1英里=1．6093公里)的速度运行，这些高速运动的电子与被称之为大爆炸“回声”的宇宙微波背景辐射中的低能量光子相碰撞，碰撞使其部分散射出的光子能量增加形成伽马射线。科学家认为，我们今天在宇宙中观察到的伽马射线背景辐射便由此形成。 以色列科学家提出的这一模型与大爆炸粒子理论相符合，使星系气云中被俘获的气体物质数量逐渐清晰起来，从而也可解开另外一个长期困扰天体物理学家的“物质丢失”之谜。根据大爆炸理论，宇宙中与暗物质相对的初始物质的数量远远大于观察到的行星和星系物质总和，大多数初始物质可能被俘获在星系气云之内，观察到的伽马射线可能是这些神秘物质存在的第一个信号。 科学家近年将利用美国宇宙伽马射线辐射研究卫星的探测结果和地面无线电探测收集到的数据验证这个模型。 文中画线句“科学家认为……由此形成”实则要强调突出的意思是（ ）A.宇宙伽马射线背景辐射形成的原因B.宇宙伽马射线形成的原因C.宇宙伽马射线背景辐射与宇宙伽马射线形成有关D.宇宙伽马射线实际上是宇宙中的一种背景辐射
依次填入下列各句横线上的成语，与旬意最贴切的一组是 ( ) A.应接不暇 琳琅满目 目不暇接 美不胜收B.目不暇接 琳琅满目 应接不暇 琳琅满目C.应接不暇 美不胜收 目不暇接 琳琅满目D.目不暇接 美不胜收 应接不暇 琳琅满目
材料题BIn the fall of 1924 Thomas Wolfe，fresh from his courses in play writing at Harvard joined the eight or ten of us who were teaching English composition in New York University．I had never before seen a man so tall as he，and so ugly．I pitied him and went out of my way to help him with his work and make him feel at home．His students soon let me know that he had no need of my protectiveness．They spoke of his ability to explain a poem in such a manner as to have them shouting with laughter or struggling to keep back their tears，of his readiness to quote in detail from any poet they could name．Indeed，his students made so much of his power of observation that I decided to make a little test and see for myself．My chance came one morning when the students were slowly gathering for nine o‘clock classes．Upon arriving at the university that day，I found Wolfe alone in the large room which served all the English composition teachers as an office．He did not say anything when I asked him to come with me out into the hall，and he only smiled when we reached a classroom door and I told him to enter alone and look around．He stepped in，remained no more than thirty seconds and then came out．“Tell me what you see．”I said as I took his place in the room，leaving him in the hall with his back to the door．Without the least hesitation and without a single error，he gave the number of seats in the room，pointed out those which were taken by boys and those occupied by girls，named the colors each student was wearing，pointed out the Latin verb written on the blackboard，spoke of the chalk marks which the cleaner had failed to wash from the floor，and pictured in detail the view of Washington Square from the window．As I rejoined Wolfe，I was speechless with surprise．He，on the contrary，was wholly calm as he said，“The worst thing about it is that I‘ll remember it all．”What can be inferred from the passage A.The author was happy to see the test resulB.What the students said was hardly truC.Wolfe would remember forever what the author had donD.Wolfe felt joyful after he had been teste
No matter how low you consider yourself,there is always someone__________you wishing they were that high.A.getting rid ofB.getting along withC.looking up toD.looking down upon