更多“一次能源包括原油、汽油、柴油、燃料油”相关的问题
当镗刀材料的（）较差时，刀具前角应取小些，反之前角可取大些。
A.耐磨性
B.耐热性
C.强度
D.韧性
E.硬度
F.耐冲击性
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要注重校长职业理想与职业道德教育，增强校长教书育人、管理育人的（）。
A.责任感
B.荣誉感
C.使命感
D.获得感
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民用航空适航管理是对设计、制造、使用和维修进行管理。
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The rate of cylinder lubricating oil metered to each cylinder of a large low-speed main propulsion diesel engine is _____.A.the same, whether at sea, or during maneuveringB.adjusted during each hour of operation while at constant RPMC.higher at sea than while maneuveringD.lower at sea than while maneuvering
A.A.theB.adjustedC.higherD.lower
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Young women who take part in beauty contests(比赛) are helping to keep alive an outdated opinion of women: that a woman’s most important value is how she looks. Women have been working very hard through the years to change their image(形象). They have been trying to prove that the value of a woman does not lie only in her beauty. The world is just beginning to recognize that women are as smart, wise and strong in personality as men are, and that there are qualities more important than looks when judging people. When women take part in beauty contests for top prizes, they encourage people to value them for their beauty alone. It is unfair to say that beauty alone determines one’s worth. Beauty contests not only encourage spectators(观众) to judge women by their appearance, but they encourage this idea in the contestants as well. These young women spend months losing weight to be the "fight" size and learning how to dress, wear makeup, and walk just fight so that some judges will consider them beautiful. I think it’s great for a woman to feel good about her appearance, but looks shouldn’t be sought after in an extreme or unreasonable way. There are too many other, more important, things in a young woman’s life: learning, developing friendships and preparing for their future work and perhaps a family. As long as there are beauty contests, women won’t be fully recognized as well-rounded human beings.
A. Looks determine everything. B. Wisdom carries much weight. C. Spectators should have their voices heard. D. Qualities other than looks are more important.
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若线性方程组设n阶方阵A的各行元素之和均为零，且RA=n—1，则线性方程组Ax=0的通解为__________。
设n阶方阵A的各行元素之和均为零，且RA=n—1，则线性方程组Ax=0的通解为__________。
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配套单电动机功率为（）kW的刮板输送机，为重型刮板输送机。
A、132～200
B、150～200
C、150～250
D、100～200
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（）突如其来的非典疫情严重威胁广大人民群众的身体健康和生命安全。
A.2000年
B.2002年
C.2003年
D.2004年
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法院地法作为系属方式，一般是解决（），其次亦解决（）。
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知觉：感性认识( )
A．意识：物质 B．管制：刑罚 C．运动：发展 D．灾难：地震
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以下哪类产品属于网略营销产品的首选产品：（）
A.地理范围窄
B.价格低廉
C.网络费用低
D.地理范围广
E.与电脑相关
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患者女性，43岁，因“下前牙牙龈反复出现脓肿2年”来诊。患者已行2次根管治疗，均未见明显好转。X线片：左下3根管恰填，根尖部有圆形透射区，约为1.8cm×1....关于根尖手术，叙述正确的是（）
A.牙根断面为唇颊向斜面
B.根尖切除斜面与牙根长轴垂直面的角度不超过10°
C.倒预备窝洞深度为1～2mm
D.根尖切除长度为3mm
E.生物活性材料是目前主流的倒充填材料
F.理想修复形式是牙根面形成硬骨板，与根周硬骨板相连
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有关夯土机械使用时应注意的事项，下列说法不正确的是（）。
A . 必须按规定穿戴绝缘手套和绝缘鞋等安全用品
B . 电缆长度不应大于50m，并有专人调整电缆
C . 多台夯土机械工作时，左右间距不得小于10m，前后间距不得小于5M
D . 操作扶手必须绝缘
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工作类型是依据（）进行分类。
A.载荷率
B.工作忙闲程度
C.工作类型
D.载荷率和工作忙闲程度
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