题目内容
滚动轴承一般由内圈、、保持架、四部分组成
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6203表示深沟球轴承，内径尺寸15mm。
30312表示圆锥滚子轴承，尺寸系列代号03，内径为60mm。
Choose the right word in brackets to fill the blanks.1. Sonia, we are ________ informed, loves her family very much.(reliable // reliably // rely)2. She is a novel ________ and reads as much as she can.(addict // addicted // addiction)3. He was the chief military to the Philippine military forces when the United States entered World War Two in December, 1941.(advise // advisor // advisory)4. Customers who select the smart security package can add the following home _____________ packages.(auto//automatic//automation)5. Since all behaviors have an evolutionary advantage or they would not have been retained ( 保留 ) for millions of years.(instinct // instinctive // instinctively)
下列关于框架梁单根上部通长筋的长度计算公式说法正确的是（）
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