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【单选题】
钳工工具用( A )钢制造。
A.
T8A
B.
T10A
C.
T12
D.
T12A
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【简答题】"," the boy finally said, "shouldn't I be learning more moves? ” , "This is the only move you know, but this is the only move you ’ ll ever need to know , ” the teacher (28) _____ .
【简答题】What does "dress neatly" mean? It means that you shouldn't wear __________.
【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.
去应力退火
B.
及时落砂
C.
提高型、芯砂的退让性
D.
采用同时凝固原则
【简答题】Photography was once an expensive , laborious ordeal reserved for life's greatest milestones . Now , the only apparent cost to taking infinite photos of something as common as a meal is the space on y...
【单选题】按《公共场所空气中氨测定方法》GB/T18204.25-2000靛酚蓝分光光度法规定的条件采样10min(5L),样品可测氨浓度范围为()。
A.
0.01~0.1mg/m 3
B.
0.01~2mg/m 3
C.
0.1~5mg/m 3
D.
0.1~10mg/m 3
【判断题】趣乐精品店-手机配件基本知识
A.
正确
B.
错误
【单选题】铸造应力过大将导致铸件产生变形或裂纹,减小和消除铸件中热应力的方法是( )。
A.
同时凝固
B.
提高型砂、砂芯退让性
C.
及时落砂
D.
顺序凝固
【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.
提高型、芯砂的退让性
B.
时效处理
C.
及时落砂
D.
采用同时凝固原则
【单选题】《公共场所空气中氨测定方法》GB/T18204.25-2000要求空气采样器:流量范围0~2L/min流量稳定,使用前后用皂膜流量计标准系统的流量误差应小于()。
A.
±1%
B.
±3%
C.
±5%
D.
±10%
【单选题】You shouldn't use "Yours faithfully" - it's too __ for this kind of personal letter.
A.
gradual
B.
nasty
C.
genetic
D.
formal
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