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【单选题】
通过调节什么尺寸可以使浇注系统平衡( )A.
分流道
B.
浇口
C.
主流道
D.
冷料穴
拍照语音搜题，微信中搜索"皮皮学"使用
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A.
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B.
出生后即有，暂时存在的反射
C.
出生后逐渐稳定的反射
D.
出生后一段时间内可存在的病理反射
E.
出生后逐渐建立，终生存在的反射
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【简答题】完形填空。 Billy is a boy of fif. His parents died three years ago. One day when he was walking in the street, he 1 a wallet. He returned it to the owner, Mr Baker. He gave his 2 to the boy. As the boy...
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