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【单选题】
铸造应力过大将导致铸件产生变形或裂纹。消除铸件中残余应力的方法是
A.
采用同时凝固原则
B.
提高型、芯砂的退让性；
C.
及时落砂
D.
去应力退火
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参考答案：
参考解析：
知识点：
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举一反三
【单选题】成人的脊髓下端位于
A.
第 1 腰椎下缘
B.
第 2 腰椎下缘
C.
第 3 骶椎下缘
D.
第 1 骶椎上缘
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【单选题】I had just posted the letter when I remembered that I hadn-t the cheque.
A.
imposed
B.
involved
C.
enclosed
D.
contained
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【单选题】回答{TSE}题： A Letter from Alan I have learnt of a plan to build three hundred houses on the landcalled Parson's Place by the football grounD．Few people know about this newplan to increase the size of ou...
A.
To perersuade the government to build new houses.
B.
To protest about a new motorway near the town.
C.
To encourage more people in the town to use Parson's Place.
D.
To inform. other people about the builders' plans.
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【多选题】一批钢制拉杆，工作时不允许产生明显的塑性变形，最大工作应力σmax＝350MPa。今欲选用某钢制做该拉杆。现将该钢制成d0＝10mm的标准拉抻试样进行拉抻试验，测得Ps＝21500N,Pb＝35100N,试判断该钢是否满足使用要求？其选材依据计算值是多少？。A.能满足要求B.不能满足要求C.依据бs≈274MPaD.依据бb≈447MPaE.依据бs≈274MPa、бb≈447MPa同时判断
A.
A
B.
B
C.
C
D.
D
E.
E
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【简答题】阅读理解。 Dear Harry Potter, Hi! I'm Kevin from India. I really feel lucky to write you a letter. Though I live far away from your world, I think we are a little alike, You are a great wizard (奇才). You ha...
查看完整题目与答案
【单选题】I wrote a letter,___ I forgot to mail it
A.
an d
B.
bu t
C.
or
D.
while
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【单选题】在画平行于水平投影面的圆的正等测图时,选用哪两个轴测轴?( )
A.
X.、Y轴
B.
X.、Z轴
C.
Y.、Z轴
D.
以上答案都不对
查看完整题目与答案
【简答题】一批钢制拉杆,工作时不允许产生明显的塑性变形,最大工作应力 σ max = 350MPa 。现对一候选材料制成的 d 0 =10mm 的标准试样进行拉伸试验,测得 F s =21500 N , F b =35100 N ,则该钢 使用要求,因为 。
查看完整题目与答案
【单选题】成人脊髓下端的位置
A.
位于椎管全长
B.
上端平枕骨大孔
C.
下达骶管
D.
下达第一腰椎下缘
E.
下达第三腰椎下缘
查看完整题目与答案
【单选题】An excerpt from a letter M y friend and I didn ’ t use to argue, but now we never get along. W e fight all the time. I hate to see him get into trouble. H e says I shouldn ’ t tell him what to do. But...
A.
doesn’t like his friend all the time
B.
wants to forget his friend
C.
used to fight all the time
D.
still wants to save this friendship
查看完整题目与答案
相关题目：
【单选题】成人的脊髓下端位于
A.
第 1 腰椎下缘
B.
第 2 腰椎下缘
C.
第 3 骶椎下缘
D.
第 1 骶椎上缘
查看完整题目与答案
【单选题】I had just posted the letter when I remembered that I hadn-t the cheque.
A.
imposed
B.
involved
C.
enclosed
D.
contained
查看完整题目与答案
【单选题】回答{TSE}题： A Letter from Alan I have learnt of a plan to build three hundred houses on the landcalled Parson's Place by the football grounD．Few people know about this newplan to increase the size of ou...
A.
To perersuade the government to build new houses.
B.
To protest about a new motorway near the town.
C.
To encourage more people in the town to use Parson's Place.
D.
To inform. other people about the builders' plans.
查看完整题目与答案
【多选题】一批钢制拉杆，工作时不允许产生明显的塑性变形，最大工作应力σmax＝350MPa。今欲选用某钢制做该拉杆。现将该钢制成d0＝10mm的标准拉抻试样进行拉抻试验，测得Ps＝21500N,Pb＝35100N,试判断该钢是否满足使用要求？其选材依据计算值是多少？。A.能满足要求B.不能满足要求C.依据бs≈274MPaD.依据бb≈447MPaE.依据бs≈274MPa、бb≈447MPa同时判断
A.
A
B.
B
C.
C
D.
D
E.
E
查看完整题目与答案
【简答题】阅读理解。 Dear Harry Potter, Hi! I'm Kevin from India. I really feel lucky to write you a letter. Though I live far away from your world, I think we are a little alike, You are a great wizard (奇才). You ha...
查看完整题目与答案
【单选题】I wrote a letter,___ I forgot to mail it
A.
an d
B.
bu t
C.
or
D.
while
查看完整题目与答案
【单选题】在画平行于水平投影面的圆的正等测图时,选用哪两个轴测轴?( )
A.
X.、Y轴
B.
X.、Z轴
C.
Y.、Z轴
D.
以上答案都不对
查看完整题目与答案
【简答题】一批钢制拉杆,工作时不允许产生明显的塑性变形,最大工作应力 σ max = 350MPa 。现对一候选材料制成的 d 0 =10mm 的标准试样进行拉伸试验,测得 F s =21500 N , F b =35100 N ,则该钢 使用要求,因为 。
查看完整题目与答案
【单选题】成人脊髓下端的位置
A.
位于椎管全长
B.
上端平枕骨大孔
C.
下达骶管
D.
下达第一腰椎下缘
E.
下达第三腰椎下缘
查看完整题目与答案
【单选题】An excerpt from a letter M y friend and I didn ’ t use to argue, but now we never get along. W e fight all the time. I hate to see him get into trouble. H e says I shouldn ’ t tell him what to do. But...
A.
doesn’t like his friend all the time
B.
wants to forget his friend
C.
used to fight all the time
D.
still wants to save this friendship
查看完整题目与答案