问题
多项选择题
以下关于储金球的说法正确的是（）
A.可补偿合金凝固收缩
B.可避免铸件缩孔
C.直径略大于铸件蜡型最厚处
D.位置距蜡型1mm
E.应在铸圈的温度中心区
答案
参考答案：A, B, C, E
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以下关于储金球的说法正确的是（）
A.可补偿合金凝固收缩
B.可避免铸件缩孔
C.直径略大于铸件蜡型最厚处
D.位置距蜡型1mm
E.应在铸圈的温度中心区
参考答案：A, B, C, E
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| Good morning, everyone! Welcome 1 Chicago, the windy city. I'm Mark Chan and I'll be your 2 today for your first time to tour 3 . We're driving along the Lake Michigan. It is one of 4 lakes as you can see, and it looks like 5 ocean. Chicago is an important city. In the 19th century, it was the central meat 6 for the whole country. The city is also famous 7 its fine museums. There are more than 15 excellent museums here. Now we 8 the Chicago Lear Opera House. Here you can hear 9 by famous singers from all over the world. Please 10 me if you would like any more information. I hope you'll enjoy your stay in Chicago. | ||||
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