更多“倍半萜分子结构中可以划分的戊二烯单位数目是（）。”相关的问题
植物细胞中1mol蔗糖彻底氧化成CO2和H2O时可产生多少molATP？
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急症病人人病区后的护理不包括
A．准备床单位B．备好急救物品和药品C．配合抢救D．下达病危通知E．暂留陪送人员
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听力原文： While a new school term is about to begin, perhaps we should reconsider the matter of examinations. In July, two writers praised the cancellation of exams because they believe 'tests don't tell the whole story.' As a teacher who has worked in four countries, I have had the experience that a student who earns good marks is generally a good student, and that a student's final mark in a subject is usually a grade average of the year's work. Of course there are exceptions, but they do not have the frequency that would give an unfair picture of a student's ability. The simple fact is that proper class work, diligent exam studies and good marks are almost certain indicators of a student's future performance. The opposite is, almost certainly, incompetence. There is no acceptable substitute for competition and examination of quality. How can teachers and future officials determine what a student has learned and remembered? Should we simply take the student's word for it? Any institution that 'liberates' students from fair and formal exams is misguided, if not ignorant. And surely the 'graduates' of such institutions will lack trustworthiness, not to mention being rejected by foreign universities for graduate or other studies. When all is said and done, I sense that a fear of failure and a fear of unpleasant comparison with others is at the bottom of most ban-exams talk. Excellence and quality fear nothing. On the contrary, they seek competition and desire the satisfaction of being the best.(33)A．Exams don't tell the whole story.B．Tests can not effectively measure students' abilities.C．The cancellation of exams should be praised.D．The two writers mentioned in the passage hold wrong conception of exams.
A.'B.C.D.E.(33)A．ExamsF.B．TestsG.C．TheH.D．The
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钨钻类硬质合金与钨钻钛合金相比，因其韧性、磨削性和导热好，主要用语加工脆性材料、有色金属和非金属。（)
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下列关于运算器的描述中，错误的是（）。
A.运算器由ALU、通用寄存器组和状态条件寄存器等部件组成 B.运算器主要完成数据的算术运算和逻辑运算 C.运算器采用十六进制运算，如加、减、乘、除等 D.运算器的字长越长，硬件电路越复杂
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关于中央型肺癌，下述哪项正确（）
A.起源于主支气管、肺叶支气管
B.起源于肺段以下支气管
C.病理上以腺癌多见
D.切除率高
E.均可通过纤维支气管镜确诊
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在创建完一个申请后，我们应将记录视图状态修改为（）
A.车间审核 B.厂领导审核 C.队长审核 D.部门审核
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35kV架空电力线路的瓷悬式绝缘子，安装前应采用不低于5000V的兆欧表逐 个进行绝缘电阻测定。在干燥情况下，绝缘电阻值不得小于（）MΩ。
A. 300
B. 400
C. 500
D. 600
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散射角小，一般不超过50°，亮度系数较高，适于长形观众厅使用是（）的特点。
A.漫散反射银幕B.方向性漫散反射银幕C.穿孔银幕D.蜂窝幕
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百日咳痉咳期的主要治法是（）
A.宣肺止咳 B.泻肺镇咳 C.润怖止咳 D.补脾益肺 E.敛肺止咳
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乳腺癌根治术后回家1个月时可做的活动负荷为（）
A.0.3kg B.0.5kg C.1kg D.1.5kg E.2.5kg
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接受监督抽查样品时，应检查（）
A.样品的数量
B.样品的状态是否完好
C.与抽样单记录信息是否一致
D.封条是否完好
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第一代计算机网络也叫（）。
A . 多个计算机互联的计算机网络
B . 面向终端的计算机网络
C . 国际标准化的计算机网络
D . 以高速多媒体应用为核心的第四代计算机网络
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