【单选题】【消耗次数:1】
It is reported that a (n)________ of accidents has occurred at that crossroads.
series
lot
number
amount
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相关题目
【单选题】 Young drivers under 25 have the highest number of accidents while those over 50 have ______.
①  the less
②  the least
③  the fewer
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【单选题】 America has a lot of _______ weapons now.
①  aggressive
②  expensive
③  passive
④  expressive
【单选题】 When a program has a small number of people_________ it, it is discontinued.
①  looking
②  watching
③  hearing
④  listening
【单选题】 A series of robberies _____recently.
①  has been reported
②  has reported
③  have been reported
④  have reported
【单选题】 Her parents objected to ____ that farmer, though he has a lot of money.?
①  her marrying ?
②  marrying ?
③  marry ?
④  her marrying with?
【单选题】 He always has a lot of _______ ideas in his mind , and sometimes we do not even know what he is thinking about.
①  novel
②  spoil
③  acceptable
④  additional
【单选题】 The amount of rainfall ____________ the crops greatly.
①  effects
②  affects
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④  decreases
【单选题】 The number of people invited ____fifty, but a number of them _____absent.
①  were; was
②  was ; was
③  were
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①  正确
②  错误
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①  smart
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随机题目
【判断题】 支反力影响线的影响线时,P=1在附属部分上移动,影响线在附属部分范围内成直线变化。()
①  正确
②  错误
【单选题】 磨削加工过程中,绝大多数的磨削热都传递给了()。
①  刀具
②  工件
③  切屑
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【单选题】 下面的叙述正确的是()
①  顺序凝固有利于防止铸造应力的产生
②  同时凝固有利于防止缩孔的产生
③  铸造时浇注温度越高越好
④  固态收缩是产生铸造应力的根本原因
【判断题】 一个杆系,在荷载作用下,即使略去杆件本身的弹性变形,它也不能保持其几何形状和位置,而发生机械运动的体系称为几何可变体系。()
①  正确
②  错误
【单选题】 应用卧式车床车削工件外圆表面时,其中车削运动的主运动由()来完成。
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②  工件的旋转运动
③  车刀的直线运动
④  车刀的旋转运动
【单选题】 纯铜销轴外圆,长度为150mm,直径为φ50h7,Ra0.8μm,适合选择下列哪个加工方案:()。
①  粗车
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③  粗车-半精车-精车
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【判断题】 两个刚片用三根不全平行也不交于同一点的链杆相联,组成几何不变体系,且没有多余联系。()
①  正确
②  错误
【判断题】 结构上点的移动和面或杆的转动称为变形。()
①  正确
②  错误
【判断题】 平面两铰拱是静定结构。()
①  正确
②  错误
【单选题】 切削加工过程中,对积屑瘤的形成和前刀面磨损有直接影响的变形区域为()。
①  第一变形区
②  第二变形区
③  第三变形区
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