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【单选题】
I think our boat can pass the treacherous water ______ cautiously handled.
A.
until
B.
if
C.
lest
D.
with
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A.
正确
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错误
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【单选题】阅读附件的文章回答下列问题: The writer says that in preparing exhibits for museums, experts
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should pursue a single objective.
B.
have to do a certain amount of language translation.
C.
should be free from commercial constraints.
D.
have to balance conflicting priorities.
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【单选题】阅读附件的文章回答下列问题: The writer says that museums, heritage sites and theme parks
A.
often work in close partnership.
B.
try to preserve separate identities.
C.
have similar exhibits.
D.
are less easy to distinguish than before.
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【单选题】已知：刨床的急回机构如图所示。曲柄OA的一端A与滑块用铰链连接。当曲柄OA以匀角速度ω绕固定轴O转动时，滑块在摇杆O1B上滑动，并带动杆O1B绕定轴O1摆动。设曲柄长为OA=r，两轴间距离OO1=l。 求：曲柄在水平位置时摇杆的角速度ω1。【图片】
A.
ω1 =r²ω/r²
B.
ω1 =r²ω/l²
C.
0
D.
ω1 =r²ω/(l²+r²)
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【简答题】图示曲柄连杆相机构，已知曲柄OA长L，重量不计，连杆AB长2L，重P，受矩为M的力偶和水平力F的作用，在图示位置平衡。若用虚位移原理求解，则必要的虚位移之间的关系为（）（方向须在图中画出），力F的大小为（）。
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【单选题】阅读附件的文章回答下列问题: In paragraph E, the writer suggests that some museum exhibits
A.
fail to match visitor expectations
B.
are based on the false assumptions of professionals
C.
reveal more about present beliefs than about the past.
D.
allow visitors to make more use of their imagination.
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【单选题】阅读附件的文章回答下列问题: According to the writer, current trends in the heritage industry
A.
emphasise personal involvement.
B.
have their origins in York and London.
C.
rely on computer images.
D.
reflect minority tastes.
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【简答题】某建设工程系外资贷款项目，业主与承包商按照FIDI以土木工程施工合同条助签订了施工合同。施工合同《专用条件》规定：钢材、木材、水泥由业主供货到现场仓库，其他材料由承包商自行采购。当工程施工至第五层框架柱钢筋绑扎时，因业主提供的钢筋未到，使该项作业从10月3日至10月16日停工(该项作业的总时差为零)。10月7日至10月9日因停电、停水使第三层的砌砖停工(该项作业的总时差为4天)。10月14日至10...
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【判断题】( )塑料注射模型腔的分型面处、浇口及进料口处应保持圆角。
A.
正确
B.
错误
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【单选题】阅读附件的文章回答下列问题: Compared with today's museums, those of the past
A.
did not present history in a detailed way.
B.
were not primarily intended for the public.
C.
were more clearly organised.
D.
preserved items with greater care.
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相关题目：
【判断题】承包商未按照合同规定时间提出索赔意向和索赔报告,则失去对该事件请求的索赔权利。 ( )
A.
正确
B.
错误
查看完整题目与答案
【单选题】阅读附件的文章回答下列问题: The writer says that in preparing exhibits for museums, experts
A.
should pursue a single objective.
B.
have to do a certain amount of language translation.
C.
should be free from commercial constraints.
D.
have to balance conflicting priorities.
查看完整题目与答案
【单选题】阅读附件的文章回答下列问题: The writer says that museums, heritage sites and theme parks
A.
often work in close partnership.
B.
try to preserve separate identities.
C.
have similar exhibits.
D.
are less easy to distinguish than before.
查看完整题目与答案
【单选题】已知：刨床的急回机构如图所示。曲柄OA的一端A与滑块用铰链连接。当曲柄OA以匀角速度ω绕固定轴O转动时，滑块在摇杆O1B上滑动，并带动杆O1B绕定轴O1摆动。设曲柄长为OA=r，两轴间距离OO1=l。 求：曲柄在水平位置时摇杆的角速度ω1。【图片】
A.
ω1 =r²ω/r²
B.
ω1 =r²ω/l²
C.
0
D.
ω1 =r²ω/(l²+r²)
查看完整题目与答案
【简答题】图示曲柄连杆相机构，已知曲柄OA长L，重量不计，连杆AB长2L，重P，受矩为M的力偶和水平力F的作用，在图示位置平衡。若用虚位移原理求解，则必要的虚位移之间的关系为（）（方向须在图中画出），力F的大小为（）。
查看完整题目与答案
【单选题】阅读附件的文章回答下列问题: In paragraph E, the writer suggests that some museum exhibits
A.
fail to match visitor expectations
B.
are based on the false assumptions of professionals
C.
reveal more about present beliefs than about the past.
D.
allow visitors to make more use of their imagination.
查看完整题目与答案
【单选题】阅读附件的文章回答下列问题: According to the writer, current trends in the heritage industry
A.
emphasise personal involvement.
B.
have their origins in York and London.
C.
rely on computer images.
D.
reflect minority tastes.
查看完整题目与答案
【简答题】某建设工程系外资贷款项目，业主与承包商按照FIDI以土木工程施工合同条助签订了施工合同。施工合同《专用条件》规定：钢材、木材、水泥由业主供货到现场仓库，其他材料由承包商自行采购。当工程施工至第五层框架柱钢筋绑扎时，因业主提供的钢筋未到，使该项作业从10月3日至10月16日停工(该项作业的总时差为零)。10月7日至10月9日因停电、停水使第三层的砌砖停工(该项作业的总时差为4天)。10月14日至10...
查看完整题目与答案
【判断题】( )塑料注射模型腔的分型面处、浇口及进料口处应保持圆角。
A.
正确
B.
错误
查看完整题目与答案
【单选题】阅读附件的文章回答下列问题: Compared with today's museums, those of the past
A.
did not present history in a detailed way.
B.
were not primarily intended for the public.
C.
were more clearly organised.
D.
preserved items with greater care.
查看完整题目与答案