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【判断题】
当空间两点的某两个坐标相同,即位于同一条垂直于某一投影面的投影线上时,则这两点在该投影面上的投影重合,此空间两点称为该投影面的重影点。( )
A.
正确
B.
错误
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参考答案：
举一反三
【单选题】You will hear a short conversation. After listening, there will be a question. When you hear the question, you should decide on the best answer from the four choices marked A,B,C and D.
A.
At the railway station.
B.
At home.
C.
In a shop.
D.
At school.
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【单选题】某地区厂房后边坡存在一不稳定边坡，假设滑面下部不透水，不考虑两侧抗剪，按刚体单宽计算，见图10-3，h=10m，边坡与水平面的夹角α=40°，滑面与水平面夹角β=26°，滑面的凝聚力c=10kPa，滑面的内摩擦角φ=30°，设滑体重W=5000kN，在考虑地下水静水压力的情况下，根据写出的安全系数计算公式，安全系数最接近于(    )。
A.
0.53  
B.
0.99  
C.
1.13
D.
1.39
查看完整题目与答案
【单选题】早产的概念是
A.
妊娠满28周至不满37足周间分娩者
B.
妊娠满28周至不满38足周间分娩者
C.
妊娠满27周至不满40足周间分娩者
D.
妊娠满28周至不满40足周间分娩者
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【单选题】You will hear a short conversation. After listening, there will be a question. When you hear the question, you should decide on the best answer from the four choices marked A,B,C and D.
A.
She likes the poison.
B.
Different people are interested in different things.
C.
Meat and poison are the same.
D.
People don't know what they like.
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【单选题】You will hear a short conversation. After listening, there will be a question. When you hear the question, you should decide on the best answer from the four choices marked A,B,C and D.
A.
She likes the model.
B.
She wants the fashionable coat.
C.
She doesn't like the model.
D.
People don't know what she likes.
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【单选题】高渗油藏压裂裂缝设计时,偏向于( )的裂缝
A.
窄而长
B.
宽而长度适中
查看完整题目与答案
【单选题】You will hear a short conversation. After listening, there will be a question. When you hear the question, you should decide on the best answer from the four choices marked A,B,C and D.
A.
White is the most popular color.
B.
No one cares.
C.
No one likes white.
D.
She doesn't care much about the fashion.
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【单选题】You will hear a short conversation. After listening, there will be a question. When you hear the question, you should decide on the best answer from the four choices marked A,B,C and D.
A.
They're talking about the fast food.
B.
They're talking about France.
C.
They're talking about the weather.
D.
They're talking about French.
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【单选题】What would we think of a person who invades our personal space according to the author？
A.
They are aggressive。
B.
They are outgoing。
C.
They are ignorant。
D.
They are ill-bred。
查看完整题目与答案
【单选题】You will hear a short conversation. After listening, there will be a question. When you hear the question, you should decide on the best answer from the four choices marked A,B,C and D.
A.
It is very suitable.
B.
He has no idea at all.
C.
The suit is old.
D.
The suit is fashionable.
查看完整题目与答案
相关题目：
【单选题】You will hear a short conversation. After listening, there will be a question. When you hear the question, you should decide on the best answer from the four choices marked A,B,C and D.
A.
At the railway station.
B.
At home.
C.
In a shop.
D.
At school.
查看完整题目与答案
【单选题】某地区厂房后边坡存在一不稳定边坡，假设滑面下部不透水，不考虑两侧抗剪，按刚体单宽计算，见图10-3，h=10m，边坡与水平面的夹角α=40°，滑面与水平面夹角β=26°，滑面的凝聚力c=10kPa，滑面的内摩擦角φ=30°，设滑体重W=5000kN，在考虑地下水静水压力的情况下，根据写出的安全系数计算公式，安全系数最接近于(    )。
A.
0.53  
B.
0.99  
C.
1.13
D.
1.39
查看完整题目与答案
【单选题】早产的概念是
A.
妊娠满28周至不满37足周间分娩者
B.
妊娠满28周至不满38足周间分娩者
C.
妊娠满27周至不满40足周间分娩者
D.
妊娠满28周至不满40足周间分娩者
查看完整题目与答案
【单选题】You will hear a short conversation. After listening, there will be a question. When you hear the question, you should decide on the best answer from the four choices marked A,B,C and D.
A.
She likes the poison.
B.
Different people are interested in different things.
C.
Meat and poison are the same.
D.
People don't know what they like.
查看完整题目与答案
【单选题】You will hear a short conversation. After listening, there will be a question. When you hear the question, you should decide on the best answer from the four choices marked A,B,C and D.
A.
She likes the model.
B.
She wants the fashionable coat.
C.
She doesn't like the model.
D.
People don't know what she likes.
查看完整题目与答案
【单选题】高渗油藏压裂裂缝设计时,偏向于( )的裂缝
A.
窄而长
B.
宽而长度适中
查看完整题目与答案
【单选题】You will hear a short conversation. After listening, there will be a question. When you hear the question, you should decide on the best answer from the four choices marked A,B,C and D.
A.
White is the most popular color.
B.
No one cares.
C.
No one likes white.
D.
She doesn't care much about the fashion.
查看完整题目与答案
【单选题】You will hear a short conversation. After listening, there will be a question. When you hear the question, you should decide on the best answer from the four choices marked A,B,C and D.
A.
They're talking about the fast food.
B.
They're talking about France.
C.
They're talking about the weather.
D.
They're talking about French.
查看完整题目与答案
【单选题】What would we think of a person who invades our personal space according to the author？
A.
They are aggressive。
B.
They are outgoing。
C.
They are ignorant。
D.
They are ill-bred。
查看完整题目与答案
【单选题】You will hear a short conversation. After listening, there will be a question. When you hear the question, you should decide on the best answer from the four choices marked A,B,C and D.
A.
It is very suitable.
B.
He has no idea at all.
C.
The suit is old.
D.
The suit is fashionable.
查看完整题目与答案
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