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【单选题】

铸造包埋材料应有一定的膨胀,主要是为了

A.
补偿铸件凝固
B.
防止包埋时将蜡型挤压变形
C.
防止液态金属注入时将型腔挤破
D.
使铸件与型腔间有一定的间隙,便于铸件分离
E.
防止铸件膨胀将型腔挤破
题目标签:膨胀铸造材料
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【单选题】How should one invest a sum of money in these days of inflation (通货膨胀) Left in a bank it will hardly keep its value, however high the interest rate is. Only a brave man, or a very rich one, dares to b...

A.
suggest human beings are controlled by a clock
B.
describe why clocks can rule the planet Earth
C.
tell readers what clocks look like
D.
compare clicks to human beings

【单选题】下列哪项不是铸造支架的优点()

A.
坚固
B.
异物感小
C.
设计不灵活
D.
无异味
E.
导热好
相关题目:
【单选题】How should one invest a sum of money in these days of inflation (通货膨胀) Left in a bank it will hardly keep its value, however high the interest rate is. Only a brave man, or a very rich one, dares to b...
A.
suggest human beings are controlled by a clock
B.
describe why clocks can rule the planet Earth
C.
tell readers what clocks look like
D.
compare clicks to human beings
【单选题】下列哪项不是铸造支架的优点()
A.
坚固
B.
异物感小
C.
设计不灵活
D.
无异味
E.
导热好
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