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搜题/搜资源
【单选题】【消耗次数:1】
She resorted to ____ when she had no money to buy foods for her children.
①
have stolen
②
steal
③
stole
④
stealing
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相关题目
【单选题】
She resorted to _____ when she had no money to buy foods for her children.
①
have stolen
②
steal
③
stole
④
stealing
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【判断题】
She had her finger cut when she is paper-cutting.
①
正确
②
错误
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【单选题】
It was not until she had finished all her work_____.
①
did she return
②
that she returned
③
when she returned
④
that did she return
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【单选题】
When she was criticized, she claimed that it was outside her _____of responsibility.
①
field
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limit
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extent
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range
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【单选题】
She went to the bank to____________ her money.
①
call in
②
draw out
③
find out
④
suffer from
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【单选题】
Lindas parents died when she was a baby, and she was __________ by her aunt.
①
turned into
②
raised up
③
grown up
④
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【单选题】
It was not until she had arrived home __________ remembered her appointment with the doctor.
①
when she
②
that she
③
and she
④
she
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【单选题】
_____ for the fact that she broke her leg, she might have passed the exam.
①
Had it not been
②
Hadnt itbeen
③
Was it not
④
Were it not
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【单选题】
When she saw the clouds, she went back to the house to ____ her umbrella.
①
bring
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fetch
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take
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【单选题】
She happily deposits the money she has earned teaching English in her savings account. Find any misplaced modifier in the sentence
①
happily
②
she has earned
③
in her savings account
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随机题目
【判断题】
铰链四杆机构如有曲柄存在,则曲柄必为最短构件。()
①
正确
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当机构的原动件个数等于机构的自由度的数目时,机构具有确定的运动。()
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松螺栓联结时,螺栓只受拉应力作用。()
①
正确
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【判断题】
周转轮系的传动比等于各对齿轮传动比的连乘积。()
①
正确
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带传动不能保证准确的传动比,其原因是______。
①
带容易变形和磨损
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带在带轮上出现打滑
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带传动工作时发生弹性滑动
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带的弹性变形不符合虎克定律
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标准直齿圆柱齿轮不根切的最小齿数是____________。
①
20
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17
③
23
④
30
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【单选题】
凸轮机构中,基圆半径是指凸轮转动中心到______半径。
①
理论轮廓线上的最大
②
实际轮廓线上的最大
③
实际轮廓线上的最小
④
理论轮廓线上的最小
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【单选题】
在正常条件下,滚动轴承的主要失效形式为______。
①
滚动体碎裂
②
滚动体与套圈间发生胶合
③
滚道磨损
④
滚动体与滚道的工作表面疲劳点蚀
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【单选题】
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①
传递拉力
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传递横向力
③
传递弯矩
④
传递扭矩
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【单选题】
设计齿轮时,若发现重合度小于1,则修改设计时应______。
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加大模数
②
增加齿数
③
加大中心距
④
增大压力角
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