單項(xiàng)選擇題中熔鑄造合金的熔化溫度為()

A.500℃以下
B.500~1000℃
C.11000℃以上
D.1200~1450℃
E.850~1050℃


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1.單項(xiàng)選擇題鑄造鎳鉻合金鑄造后線收縮率為()

A.2%~0.5%
B.43%
C.24%~1.26%
D.8%~2.10%
E.13%~2.24%

2.單項(xiàng)選擇題鑄造鈷鉻合金鑄造后線收縮率為()

A.2%~0.5%
B.43%
C.24%~1.26%
D.8%~2.10%
E.13%~2.24%

3.單項(xiàng)選擇題鑄造金合金鑄造后線收縮率為()

A.2%~0.5%
B.43%
C.24%~1.26%
D.8%~2.10%
E.13%~2.24%

4.單項(xiàng)選擇題自凝塑膠的線收縮率為()

A.2%~0.5%
B.43%
C.24%~1.26%
D.8%~2.10%
E.13%~2.24%

5.單項(xiàng)選擇題加熱固化型樹脂的線收縮率為()

A.2%~0.5%
B.43%
C.24%~1.26%
D.8%~2.10%
E.13%~2.24%